What Does a Photon Do If It Finds Itself Alone? Say a Street Light Emits Light into the Night and So

Yes, photons do not stop until they hit something and are absorbed. We can still pick up photons from the big bang. As the universe expands their frequency has dropped so they are now cosmic background radiation.

What Does a Photon Do If It Finds Itself Alone? Say a Street Light Emits Light into the Night and So 1

1. A street light is at the top of a 18 ft tall pole...calculus help!!?

Use similar triangles Let x be distance of woman from the pole. Let s length of shadow. 18/(xs) = 6/s 18s = 6x 6s 12s = 6x s = x/2 ds/dt = 1/2 dx/dt Woman walks away from pole with a speed of 6ft/sec: dx/dt = 6 How fast is tip of shadow moving when she is 50ft from base of the pole: find ds/dt ds/dt = 1/2 * 6 = 3 So tip of shadow is moving at a rate of 3 ft/sec (no matter how far woman is from pole)

2. Street Light Shining In Bedroom?

Try putting "black out" curtains up

What Does a Photon Do If It Finds Itself Alone? Say a Street Light Emits Light into the Night and So 2

3. how do you find the shadow of a 5 ft tall person if he or she is 30 ft away from a 20 foot tall street light?

Hypotenuse theorum. A squared B squared = C squared. You take the two distances you know, add them. Then you square your answer and that's the answer. The hypotenuse of any right triangle is equal to the square root of the sum of the remaining sides.

4. 1. A street light is mounted at the top of a 15 foot pole. A man 6 feet Tall is walking away from the pole alo?

the respond is autonomous of the gap from the pole, and of the guy's process holiday. you will discover this via noting that the guy's head travels freely in a airplane parallel to the floor, and 6 ft above it. So the lamp initiatives factors in that airplane onto factors on the floor, magnifying each and every little thing interior the 6-ft-intense airplane via a similar ingredient, 15/(15 - 6) = 15/9 = 5/3. So the quick answer is (5/3)*4 ft/s = 20/3 ft/s a image will make this sparkling. Idealize the top of the guy's head and the sunshine as factors, the floor as a horizontal airplane, and draw a diagram of a vertical bypass-section (a vertical airplane) via the lamp and the guy's head. the floor is a line, the lamp is element A, the top of the guy's head is B, and AB prolonged to the floor line, crosses it at D, it relatively is the tip of the shadow. Now hit upon element C rapidly below A, and 6 ft above the floor line. place F on the foot of the pole, on the floor, rapidly below A. Triangles ABC and ADF are comparable, as a results of fact: AB lies alongside advert, AC lies alongside AF, and BC and DF are parallel, the two being horizontal. So DF/BC = AF/advert = 15 ft / 9 ft = 5/3 yet DF is the gap of the shadow tip from the backside of the pole, and BC is the gap of the guy's head from the pole. So now call x the dimensions of BC, and y the dimensions of DF. Then y = (5/3)x dy/dt = (5/3)dx/dt dx/dt = the guy's speed = 4 ft/s. So dy/dt = (5/3)*4 ft/s = 20/3 ft/s = 6ft 8in /s

5. Street light goes out when I walk by?

Haha no but maybe you have a tendency to alter to flow of electricity to lights. If so I would seriously get famous with my "power"

6. How much does it cost to run a street light in Lincoln, UK?

Most if not all, lamp posts in the UK have a code number on them.Make a note of the number, ring your local authority, and ask to be put through to whichever department looks after street lighting, usually the highways department.Quote the lamp number to a technical person, and ask what wattage bulb or tube is at the head of that lamp post. Take down the figure he or she gives, then knowing both the voltage of the lamp, usually 230 volts, .and the wattage you have been given, it will simply be a matter of referring to a google page for the answer,For example, a 1 kw lamp driven by 230 volts will consume approx 4.5 amps

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Smart Street Light Establishment  JC Global Foundation
Smart Street Light Establishment JC Global Foundation
Scheme to set up solar street lights is being implemented across the country to facilitate solar street lights in in general villages. Recent technical advancements have paved the path to the rebirth of solar street lights. As this is one of the best energy efficient solutions. In a tropical country like India, adoption of solar street lights can make more practical sense while empowering the energy management system of the country. Currently, the solar street lights are established in rural areas as they are more useful in villages and provide lighting in streets. There is an inevitable need of electricity in rural areas, mainly for night lighting and tis problem can be easily solved through solar light establishment. Keeping in mind the electricity needs of such households living in rural areas, solar street establishment are made available in rural areas. We, at JC Global Foundation, aim to bring energy management solutions across the world through solar street light establishment at public places. With the solar street lights establishment, we intend to empower the adoption of solar based energy efficient systems along with the cutting-edge solar lighting technologies. It is necessary to create public awareness regarding renewable energy in order to establish solar street lights on a large scale.1. Is this a good tank set up?Too many fish... I think the max rule is 1 fish per gallon of water. You will need more algae eaters too. What kind of lighting are you using?2. question fo professional photographers Canon lens?If you've been using your XT for a while, you should have a good idea of what focal length works best for you. My guess is something like 50mm. If you want better image quality in that range, you coud pick up a Canon 50mm f/1.8. These are fairly inexpensive and you can use a larger aperture than with any zoom lens. But a zoom lens - even the 18-55mm kit lens - should work nicely until you have specific reasons to upgrade. Also pay attention to how other portrait photographers use lighting. This is at least as important as buyng a better lens.3. how to get the best video quality out of canon dlsr?It's not a question of "the best setting." It's a question of understanding exposure, lighting, dynamic range, lens quality, which aperture to use, etc. etc. etc. In other words, go learn the basics of photography and the basics of cinemaphotography -- then your video will improve. The camera is quite capable of stunning video, but you need to know how to get it. Peace.4. Can seeds from store bought ORGANIC fruits and vegetables be planted to grow your own vegetables or fruits?As others have said, just avoid the hybrids. They do not usually have much flavor. You want to look for "heirloom" seeds. These are the ones that usually have not been altered in some way. Some of my favorites are not heirlooms at all, but if you are inexperienced, that's always a safe route. I get my seeds from locals I trust, from my own plants that I've harvested, from nurseries, even sometimes from Home Depot, because I've come across some great ones in hardware stores (not always, but consistently). You can even try places like ebay, at least as long as you trust the source. (After all, anyone can claim they are growing organic/heirloom/whatever seeds.) If you are going to grow indoors, though, you need to consider germination temperatures and lighting. Some peppers require higher temperatures to germinate. Other seeds need to be frozen or refrigerated first. You also need to consider your climate and whether or not you will be moving the plants outside. If you are going to do this often, I have some suggestions for indoor lights. Feel free to email me if you need help with anything. I've been starting my plants indoors in many different climates for years.5. Do you look different (bad lol) in certain lighting, like fluorescent? BDD?When a person has BDD, things like lighting can make them see a completely different person in the mirror. The truth is, you looked exactly the same without the lamp as you look with the lamp. Some types of lighting can flatter certain people, or make them look worse, but the difference is not too dramatic. If I were you, I would put a dimmer lightbulb in your lamp or get rid of it. Even though others are not seeing what you are seeing, you should avoid things that cause issues with your BDD
Best LED Street Light
Best LED Street Light
The LED street light has brought many benefits to the car drivers. They have helped a lot in making the driving experience more comfortable.As most people know, it takes a long time to be able to figure out how to use them because of their complexity and that they are not always readily available at the places where you need them.LED lights are the most efficient form of road lighting. They consume very little energy and are quite affordable. These lights are also very bright, which will help users to see cars on dark roads in the dark at night.The writer’s block is a common problem among writers. It can be caused by many factors. It could be that you are under pressure, or tired and just want to take a breather.It could also be caused by the small size of the LED lights on the road sign as you drive down them. Or, it could just be due to bad lighting conditions on the streets and roads in your area.The writer’s block can cause a lot of frustration resulting in an inability to write anything at all. The solution is simple - get yourself some LED street light bulbs! They are small enough that they don't require too much space, yet they give out enough light for writing that cannot be achieved from other types of street lights or lamps.When it comes to the lighting industry, LEDs are not new. However, their rapid increase in popularity and their adoption in the automotive industry is of great interest to us.Many companies rely on LED technology to solve their lighting problems. They use them for all kinds of lamps and streetlights, not just traffic lights.The Scandinavian road construction industry has used LED street lights for many years. They are becoming more and more efficient as the technology improves.Architecture of LED street lights is still a mystery. The international jury awarded the prize for best LED street lamps to the Dutch company, Lumens.The reason: Lumens has developed an algorithm that not only decides which light to use but also reports its performance to the client and their decision-making team.The LED Road Street Light is a new type of street light which saves energy and allows cars to be driven safely on streets. LED technology has been developed to save energy costs in commercial buildings in recent years.We should not think of these LED writers as a replacement for human writers. They just provide assistance to the content writers by generating content ideas at scale.AI writing assistants are increasingly getting popular in the workplace. Some companies use them when they need to generate content for a specific topic or niche. While digital agencies use them to generate all kinds of content for their clients and clients also use them for their own businesses projects too - e-commerce stores, e-marketing platforms, CRM systems etcetera.LED light bulbs have become very popular in recent years. They are lightweight, efficient and cost effective. But are they safe?In the UK, there is a huge demand for LED road lights. These lights help drivers to see better at night and reduce accidents on the roads.Here we will present the small and decent LED Road Street Light (S.LED) model. There are different types of LED street lights in the market. In this project, we will discuss about the best type of road light for your home or office.LED lighting is one of the most popular lighting technology in the world. Its efficiency is impressive and its low power consumption makes it ideal for various applications.The introduction should include a brief introduction on LED lighting.In 2016, China's total LED lighting market is expected to reach $1.2 billion. In 2017, China's total LED light bulb market reached $300 million."LED Road Street Light" is a road sign that gives direction to the drivers on a unlit road. It shows how to make a turn or get out of the way within five feet of it.We have been living in a world of technology that has resulted in growth of our knowledge. But we still are not able to fully utilize all the technological advancements. For instance, we do not have any road lighting system that is capable to prevent traffic accidents and road accidents. This is because different states have different rules for how street lighting can be installed on the roads and how it can be used.In this society, there are people who get frustrated if they do not have sufficient light for their business or if they cannot find parking space near their business premises at night time. LEDs Lighting for your Business - Is it possible? By using LEDs lights, you can ensure enough illumination without wasting energy.
What Is the Market for Solar Street Light Lazada in China?
What Is the Market for Solar Street Light Lazada in China?
According to relevant estimates, the total number of existing street lights in China is about 100 million (also estimated at 200 million), and it is growing at a rate of 20% per year. If this billion street lights can be converted into 60 million 250-watt street lights, Assuming that all 60 million street lights are converted into solar street light lazada, a total of 15 million kilowatts of power can be saved. Assuming that each street lamp works 12 hours a day, it will save 65.7 billion kWh of electricity in one year. The Three Gorges Hydropower Station generated a total of 61.603 billion kWh of electricity in 2007. Therefore, the energy saved by changing all the street lights in the country to solar street light lazada will exceed the annual power generation of a Three Gorges Hydropower Station. This is an extremely alarming number. We must know that the total investment of the Three Gorges Project exceeds 180 billion yuan, plus more than 40 billion of transmission and distribution projects totaling more than 220 billion yuan. And there are more than one million immigration issues, plus many unpredictable issues about the ecological environment.So, how big is the market capacity of China's solar street light lazada? According to the Taiwan Optical Industry Technology Development Association, the global LED street lamp market size will reach USD 1.04 billion in 2008, and the Chinese market will account for approximately USD 560 million. The number of LED street lights will reach 500,000. It is expected that in 2009, the global LED street lights will rise sharply from 900,000 this year to 2.1 million, and the penetration rate will exceed 1%. In 2010, the global LED street light market size will grow to 4.4 million, and the penetration rate will increase to more than 2%. Based on past growth rates, it is assumed that China will still increase by more than 20% in 2009, reaching at least 600,000. If the high-pressure sodium lamps originally used 250 watts of electricity each, the total power consumption would reach 150,000 kilowatts. After being converted to solar street light lazada, not only these electrical energy will be saved, but also a considerable amount of solar energy. Assume that the LED street light only needs 100 watts each, and the required solar panel is about 4 times the power, which is 400 watts. 600,000 units require 240,000 kilowatts of solar panels. It has already far exceeded the total amount of current solar panels.In fact, the entire street lamp market in China is huge, with 17 million installed in 2007 alone. Of course, most of them are ordinary AC high-pressure sodium lamps, not solar street light lazada. If the total number of street lights installed in 2009 can reach 20 million, and all use led street light with solar panel, the total power of the required solar panels will reach 8 million kilowatts. The NDRC's task of 1.8 million kilowatts by 2020 can be completed 4.4 times over the next year. And in three years, its total power will exceed 24 million kilowatts, far exceeding the total installed capacity of the Three Gorges Hydropower Station (22.5 million kilowatts) caused by 18 years.More importantly, the development of led street light with solar panel does not require the government to concentrate such huge human, material and financial resources, and it does not require immigration to millions, and there is no concern about ecological environment. As long as the power of local governments at all levels can carry out. And this does not require additional input from governments at all levels, because these street lights are already planned, but they are just replacing the original high-pressure sodium lights with led street light with solar panel·RELATED QUESTIONWhich custom lighting design manufacturers would you choose to work with (as in, your preferred list of custom lighting design manufacturers for new projects, renovations, and/or construction of a new home and/or commercial property) and why?Residential and commercial lighting are different products. You do not give a reason for wanting custom vs. off the shelf products.A unique custom lighting product is backlit onyx and hinoki wood walls, desks, columns, and stairs by GPI Design of Cleveland. The onyx and hinoki veneer are sandwiched between glass.Boyd Lighting is a San Francisco Bay Area maker of high end lighting.Phoenix Day is another Bay Area custom manufacturer.Holly Hunt is a collection of custom lighting manufacturers.Working with a lighting designer will save you time and money while guaranteeing your project will meet codes, function, and look good.
Solar Street Light Pole Classification, Which Are the Street Lamp Pole Materials
Solar Street Light Pole Classification, Which Are the Street Lamp Pole Materials
With the increasing demand for solar street light, the market for its accessory products is becoming more and more huge. But do you know? In fact, street light poles also have different classifications, and the material used for street light poles is also different. Some streetlight poles are sold overseas, and some gradually withdraw from the market. Let's talk about this streetlight pole.Stainless steel rods have the best chemical and electrochemical corrosion resistance in steel, second only to titanium. The method adopted in China is to carry out hot-dip galvanizing surface treatment, and the product life of hot-dip galvanizing in line with international standards can reach 15 years. Otherwise, it is far from reaching. Mostly used in courtyards, communities, parks and other places. Heat resistant, high temperature resistant, low temperature resistant and even ultra-low temperature resistant.The aluminium alloy street lamp pole is made of high-strength aluminium alloy. The manufacturer not only protects the safety of personnel, but also has high strength, does not require any surface treatment, has more than 50 years of corrosion resistance, and is very beautiful. It looks more upscale. Aluminium alloy has better physical and mechanical properties than pure aluminium: easy processing, high durability, wide application range, good decorative effect, rich colour and so on. Most of these streetlights are exported overseas, especially in developed countries.FRP rod is a kind of inorganic non-metallic material with excellent performance. It has many advantages, such as good insulation, heat resistance, good corrosion resistance and high mechanical strength, but the disadvantage is that it is brittle and wear resistance is poor. Therefore, not many are used in the market.Iron street light pole, also known as a high-quality Q235 steel pole. It is made of high-quality Q235 steel, hot-dip galvanized and sprayed, which can be rusted for 30 years and is very hard. This is the most common and used the street light pole in the street light market.Because the quality of the lamp pole of the street lamp will directly affect the service life of the lamp post. Therefore, it is recommended that when choosing a street light pole, be sure to choose whether the material is suitable (according to the climate of the region)! Nowadays, the street lamp poles selected in urban areas are generally galvanized pipes. This kind of material poles is more affordable and convenient to use. At the same time, it is strongly recommended: when buying, you must find a professional street lamp pole manufacturer, you can not buy cheap, and choose a bad street light pole, so as to avoid further loss in the later stage. We are committed to creating high-quality, beautiful and economical and durable street light poles for customers to buy. Rest assured, use the rest assured.Of course, the best solar poles have not yet been developed, but as research progresses and technology advances and production costs decrease, there will be better quality poles.Aluminum protects itself from corrosion. Why is it necessary to anodize aluminum to make it corrosion resistant?FOR OTHERS WHO NEED THE DETAILS:Aluminum forms its oxide on its exposed surface which acts as a protective coating. It is a reactive metal and hence reacts spontaneously with the oxygen from the environment. The reaction product is Aluminum Oxide which is hard and impermeable. Once the complete layer of the oxide coating is formed, it prevents further oxygen intake and makes the surface passive.Then why do anodizing at all which is the same as its oxide formation mentioned above?Factors which affect a chemical reaction are mainlyThe reactivity of the reactants.Speed of the reaction.The temperature at which the reaction is optimal. The concentration of the reactants. Physical State of the reactants and products. (Solid, Liquid, or Gas)Pressure, Volume, and the quantity of the reactive sites.In the open to atmospheric oxygen reaction, none of the factors affecting the reaction can be controlled. So the formation of the oxide layer would be uneven. This results in a lack of adhesion of the oxide layer with fissures appearing on its surface.Anodizing is a process which is highly controlled and mostly done at high temperatures. The process itself is comparable to electroplating. The main difference being, in electroplating, we deposit a metal or non-metal on the surface of the object electroplated. In anodizing, the surface of aluminum is oxidized through an electro-chemical process. Anodizing is a process in which the object to be anodized is connected as the anode in a related electrolyte. Other reaction parameters like the concentration of the electrolyte bath, the temperature of the process can all be controlled. This leads to uniform deposition even if the surface is contoured. Finally, the big dividend of the anodizing process is the coloring of the object and sealing of the surface. It is also possible to produce articles which are Bright, Dull, or with a Sheen.To conclude, the benefits due to the process of anodizing are:The surface of an aluminum object is oxidized uniformly. The surface is sealed improving the longevity of the object.The finish of the object is much more versatile and aesthetic. It can be colored, made bright or dull or shiny. Even contoured or complexly shaped objects can be anodized and colored.If you have doubts, please mention it in the comments
Use Led Street Light to Illuminate Roads
Use Led Street Light to Illuminate Roads
The significant use of led street light is a great way to illuminate the streets. Today some of the major cities in the world have swapped to the usage of these bulbs to save potential energy and overall costs. With the recent developments in the field of science and technology, there have been various evolutions in the lighting systems.Nowadays the Light Emitting Diode (LED) bulbs are being used for a variety of purposes. It is widely used in homes, commercial centers and for indoor plants. These lights are known to possess a wide number of qualities. Some of the most important advantages of these lights shall be discussed in the following sections.Reasons to Use Led Street Light The invention of the led street light is considered to be a major breakthrough in the history of mankind. It has become a one-stop solution to many countries which face severe power shortages. Let us discuss the major benefits of installing these lights.Economical: The led street light consumes comparatively lesser power than the ordinary lights. As it consumes lesser power, it is known to be economical.Environment-friendly: Unlike the ordinary lights, it does not release harmful toxins into the atmosphere. These lights are made of diodes unlike the fluorescent lights which are made of filaments.Durable: Another major benefit of using these lights is its potential durability. It is known to last longer due to the use of diodes which accelerates the efficiency of the bulbs.Incomparable brightness: The led street light is popular for its bright illumination. It is also known to provide better night visibility and lights up a wide area of streets.Uniform light: One of the greatest advantages of using these lights is its uniformity. It emits bright and uniform light which is quite essential for dark streets.Less maintenance: Popular for its durability, these lights incur lesser maintenance costs compared to the other street lights. It need not be replaced often as it can be used for years together.Instant switch-on: The led street light switches on in an instant and hardly produces any heat.Shock-proof and cool: Another added advantage of these lights is its cool temperature. Since these bulbs are not made of glass, it does not heat up and can be touched. It is therefore used for growing indoor plants.Maximum productivity : These lights utilize minimum energy to provide ultimate brightness. Concentrated and uniform lighting source can be obtained through these lights at minimum costs.A Wide Variety Available At Online Stores With the widespread popularity and usage of these lights, it is available in different varieties in many of the leading online stores. Lights of different colors can also be bought from online stores at various attractive prices.Most of the online stores offer customized options to its buyers. However, it is important to choose authentic dealers who supply guaranteed products at reasonable price rates. With reasons wide and varied, it is quite evident why the led street light is becoming so popular among majority of the countries today.
IP66 Snail Outdoor Solar Street Light Lumussolem S3: Everything you want to know
IP66 Snail Outdoor Solar Street Light Lumussolem S3: Everything you want to know
Environmental lighting has become increasingly important in human production life. When traditional lighting needs to be powered by thermal power generation and nuclear power plants, thermal power generation causes high carbon dioxide emissions, which affects the earth's ecosystem and brings extremely many natural disasters to human beings. Nuclear power plants are faced with the problem of how to deal with nuclear waste. The respective advantages and disadvantages of traditional lighting and solar lighting are fundamentally that the former is not affected by any weather, the power is not affected, the lighting market and power is more stable; solar lighting is limited by light and heat, the stability of lighting, the defects of the technology cause the length of light and power output is not stable. Based on this reason, LumusSolem developed the LSS intelligent charging and discharging system to solve the charging time and intelligent discharge, solve the fundamental problem of 15 continuous rainy days of long-lasting light. Design concept: using integrated stamping mill, the appearance is similar to a snail, this design can not only improve the aesthetics of the product, more through the integrated design to form the strength of wind resistance, easy to install, according to the installation drawings provided by LumusSolem engineers, the sunward angle is precise, easy to use in the future. Material: solar photovoltaic panels we completely use qualified A-grade monocrystalline silicon panels, tweezers with wide and thick, to improve the charging efficiency while increasing the efficiency of electricity storage, easy to irradiate the short duration of the area charging does not affect the use of lighting.Solar photovoltaic panels around the aluminum using No. 11 aluminum, this material is more corrosion-resistant, not easy to deformation pull bad solar crystal silicon plate, to ensure 25 years of service life.Battery: lithium iron phosphate battery, limited by the battery properties, in low energy consumption, lithium iron phosphate is the best choice (please refer to the article battery properties for details)Solar back using advanced PET plate, rather than PC material, PET plate long-term corrosion is not easy to deformation becomes brittle, fracture occurs, will lead to water beads into the crystal silicon plate inside, which will greatly affect the service life.Die-casting aluminum and frosted paint: aesthetics to enhance the product at the same time wind resistance and resistance to deformation strength is relatively high, long-term outdoor use, salt and alkali resistance strength is relatively highLamp beads and lenses: Osram lamp beads and Japanese imported lenses, independent open grinder, involving the lighting effect when dischargingScrews: all 304 stainless steel pressurized treatment, long-term outdoor use is not easy to rust corrosion, improve the safety of product use and aesthetics Lighting system (LSS): to solve the solar lights rely on the weather (heat and light energy impact) to effectively solve the charging effect to improve the discharge length of 10 to 15 consecutive cloudy days (please refer to www.lumussolem.com for details) Application scenarios: campus playgrounds and roadways, residential roadways, villa wall lights
The Correct Manner to Take Off, Going Up Hill in a Manual, From a Street Light?
The Correct Manner to Take Off, Going Up Hill in a Manual, From a Street Light?
Well you should be stopped on the hand brake.1. explain whether prices are or are not determined in a free market?The prices , whether it is determined by the market, depends on the type of commodities. Some goods are better left to the market to determine its price, but some needs an interfering hand. For example, prices of house, stock market, handphone, TV are more welfar enhancing if we leave it to free market forces. However, goods such as street light, the cleanliness on the beach, the KTM services, low cost housing are better regulated partially or fully by authority, in order to protect the welfare of the needies. So it depends2. A woman 5 feet tall is walking away from an 18 foot street light at the rate of 2 ft per second. At what rate?LOL!!!!! I would think the rate says 2 ft per second> I am a genius no calculus necessary3. How to Report a Street Light Outage in Charleston | City of CharlestonStreet lights provide an important element of safety and security for City residents and motorists. It's important that they are always working and repaired promptly when one burns out. If you see a streetlight that needs repaired in front of your home or business, the first thing you should do is determine who owns the light - Appalachian Power, the City of Charleston or the WV Division of Highway (WV DOH). Street lights maintained by Appalachian Power are typically on a wooden pole and have a horizontal metal or plastic tag on the pole with three numbers, a letter, and three numbers written on it. (see photo below). Street lights maintained by the City of Charleston do not typically have tags on the poles. Street lights maintained by the WV DOH have a horizontal tag with "DOH" and the pole number written on it. To report an inoperable Appalachian Power street light,aspx.4. do you remember back in the day you had to be home before the street light came on?yes!!! ahahahaha5. A street light is hung 18ft above street level. A 6foot tall man standing directly under the light walks...? * * *-- denotes height of lamp * denotes man walking away from light -- denotes the shadow Height of lamp y Heigh of man h length of shadow x current distance of man from light w from diagram we see that (wx ) /y = x/h w x = (y/h) x x( y/h -1) = w y and h are constant y = 18 h = 6 x(18/6 -1 ) =w 2x =w differentiating with respect to time 2 dx/dt = dw/dt dx/dt = 3/2 ft/sec6. Who Do I Contact About A Burnt-Out Street Light?!?i would guess it would depend on whether you are on a state highway, a county road or inside city limits. you might start with city hall in nearest town and they should be able to refer you to the right department7. I saw a camera on a street light, its super small n short on a street light, looked it up on site, wasnt there?Its a spoof,8. Street light does not go off during daylight?There must be a short circuit or bypass in the light fixture itself, or the socket that the photocell plugs into is damaged or defective. It happens occasionally.9. flashed at a street light?its whoever the car is registered to, but if your a good friend you would pay the ticket, but the ticket will be wrote out to them not you10. I hate street light cameras?it wasnt a camera bro. it was a ufo11. What happens if a street light falls on your car?The bottom of the street light is corrosive very bad, it fell on top of the car I just buy for my son12. How to sell street light?Put it on eBay, with a "buy it now" price, and specify that it's "local pickup only" so that the buyer has to come get it from you13. i have a pocket bike it has street light,turning signal and break light is it still illegal?It is not illegal. IT IS LEGALLY A TOY!!!!! A toy is a toy, is a toy, is a toy. It is not illegal to be a toy. It IS illegal to play with toys in the street. It does not matter what lights it has. You could put blue ones on. IT'S STILL A TOY!
How to Choose LED Street Light Head? - Wenzhou Walton Electrical Co., Ltd.
How to Choose LED Street Light Head? - Wenzhou Walton Electrical Co., Ltd.
LED street lamps are an important lighting facility for urban road lighting. Nowadays, LED street lamps are used in parks, courtyards, squares, schools or residential areas. The assembly of LED street lamps is also very simple. The lamp holder of LED street lamps can be realized by adding lamp poles. But many people do not know how to choose the right LED street light head. So what are the buying tips for LED street lamp holders? Let's introduce it to you. Lamp body: LED street lamp heads are all made of aluminum alloy die-casting, which can effectively dissipate heat, waterproof and prevent dust. The surface of the lamp body is painted or anodized, as well as anti-ultraviolet and anti-corrosion treatment, so that the LED street light lamp holder reaches the IP65 standard, which extends the normal operating life of the LED and electronic parts inside the lamp holder. Face shield: The face shield of the LED street light lamp holder should be made of high-strength tempered glass material. This glass material has been specially processed, and will not produce light spots and flowers during lighting. The light transmittance is close to 100%. Such LED street light lamp double bulb holder can be dust-proof and waterproof , explosion-proof, protect the internal structure of the lamp holder, and extend the service life of the thread bulb holder. Chip: The LED street light lamp head uses a high-lumen chip, which can effectively improve the light efficiency; the internal uses ultra-thick double gold wire connection to increase the current flow. This LED street light has a stronger and brighter lighting effect, a more stable light, and a lifespan. Longer; Lens: The lens is very important in the LED street lamp head. It is related to the utilization rate of the light. Generally, an optical lens is used. Such a lens can reasonably distribute the light, make the light distribution more uniform, and increase its illumination brightness. Heat dissipation: LED street light lamp caps generally use industrial-grade heat dissipation technology, which has very good thermal conductivity, which can make the heat in the LED street lamp caps better convection with the outside air, shorten the heat dissipation time, improve the heat dissipation efficiency, and ensure the use of LED street lights life. Protection: LED street light lamp holder contains high-quality silicone sealing ring and respirator. The professional design of LED street light lamp caps guarantees IP65 protection level during the life cycle, which not only guarantees good lighting performance during the life cycle, but also reduces the life cycle and cost of LED street lamp cap maintenance. Power supply: Waterproof power supply, reliable and durable, high power supply efficiency, low power loss, LED street outdoor bulb holder adopts two-stage PFC design, electronic components and related materials are sophisticated, anti-grid surge protection, to ensure the service life of the lamp. The LED market is really full of vitality, and today's LED street lights have begun to become the main force of the national lighting. I believe that in the future development, led tube light holder and led strip light holder will become mainstream.1. i live in a park home and there is a street light just outside, my electric keeps tripping out and the street?in some places the street lights are running off your elect, you should check with whom ever runs the common area about the light being run off of your system, start turning off your breakers ,one at a time, and see if the light goes out, thats one way to check2. What should be the PWM Frequency LED dimming in street light luminaryThe term you need to search on is Flicker Fusion Threshold Quoting from part of the wiki article, we have this: In some cases, it is possible to see flicker at rates beyond 2 kHz in the case of high-speed eye movements (saccades) or object motion, via the "phantom array" effect. Fast-moving flickering objects zooming across view (either by object motion, or by eye motion such as rolling eyes), can cause a dotted or multicolored blur instead of a continuous blur, as if they were multiple objects.You need to think not only about what the eye can directly perceive, but possible stroboscopic effects3. Is it legal to make a left turn from a one way street to another one way street, if the light is red?In Wisconsin you can never legally turn left at a red light without a arrow
Advantages of solar street lights
Advantages of solar street lights
The world has recently suffered from pollution, and pollution is also produced as a by-product of energy production. Usually, electricity is generated from non-renewable resources (such as fossil fuels), and these resources will be used up quickly. The world is trying to improve itself by turning to solar, wind and other forms of renewable energy. Therefore, solar energy is one of the best alternatives to replace non-renewable resources.   Solar energy is one of the cleanest energy sources, and it is also supplied in large quantities worldwide. In terms of economic and environmental issues, this advantage of solar street lights has a greater impact on the current society. Most of the grid energy is consumed by industry and public infrastructure, and solar street lighting systems provide the ultimate solution for improving the world.   The LED solar street light is an off-grid system, which means it has nothing to do with the energy generated and provided by the grid. Solar street lights can generate their own energy and consume it by themselves. The advantages of solar street lights prove that solar LED street lights are one of the best energy-saving solutions in the lighting market. These types of street lights have economic, environmental and social advantages. Advantages of solar street light system.   From an economic point of view, providing solar lights is the only big investment to be done. Solar street lights can take care of themselves for a long time without the user having to pay any electricity bills. The convenience of using solar energy is one of the reasons why most countries with high solar radiation seek to adopt these street lights.   Solar street lights also have environmental advantages. The carbon emissions of the photovoltaic panels of solar LED street lights are zero. Compared with the carbon emissions of traditional lighting technology, the LED lights of these street lights have very low carbon emissions. Since less carbon emissions lead to a better environment, this in turn proves that solar street lights are environmentally friendly.   In order to give you a deeper understanding of the benefits of solar street lights to the environment, compared with traditional lighting, the carbon emissions produced by solar lights are reduced by 96-98%. Finally, solar street lighting systems can not only save the environment, but also can be used to illuminate remote areas, villages, towns and cities around the world, thereby improving people's lives.
How Many Days of Sun Light Does It Take to Power One Street Light?
How Many Days of Sun Light Does It Take to Power One Street Light?
A typical street light might be 250 watts. A solar panel might collect 25 watts per square meter. When you consider clouds in most places half the time, you would need 10 square meters of solar panel to run one street light. Then there is all the energy needed to make the solar panels, and install them. So the answer is: 182 days of sunlight, and a BIG solar panel, to power one street light for one year. Would not it be better to put all the solar panels in one place? A 1 km x 1 km solar panel is 100,000 times bigger than a 10 square meter panel, but it costs less than 100,000 times to make and operate. Then you could run wires to bring the electricity to each street light. Oh wait -- the street lights ALREADY have wires to bring electricity to them. And with one big panel, you could put it in Arizona, where there is more sunlight and fewer clouds. It has been figured that a 100 x 100 mile solar "farm" could provide most of the power for the US.1. Street Light or Traffic SignalThe City of Saint Paul does not maintain alley lights, please call Xcel Energy at (800) 960-6235 to report problems with alley lights. Have you seen a street light within Saint Paul's City limits that's burned out or not working correctly? Report it online. Have you seen a traffic signal within Saint Paul's City limits with a burned-out lamp or one that is not working correctly? Please report it to the City's Signal Maintenance Office by calling 651-266-9777 during normal business hours or 651-266-9700 after hours. Please tell us all about the signal. (i.e, "The 'Do not Walk' is not working on the northwest corner of Kellogg and Wabasha".)2. I saw a camera on a street light, its super small n short on a street light, looked it up on site, wasnt there?Its a spoof,3. How tall is the average street light?This Site Might Help You. RE: How tall is the average street light? You know, the kind that are about the height of a two-story building?4. Why do people in the USA drive with their high beams on even when there is a street light? Why do they not lower the beam for incoming traffic?They do not do this. I have bern in US for over 40 years. I have rarely used the high beam. I am not sure how you got this idea of Americans using high beam and not lowering the beam5. A street light is mounted at the top of a 15ft-tall pole. A man 6ft tall walks away from the pole with a speed?Let us say that the man is distance d from the light pole. Construct a triangle from the top of the man's head, straight back to the pole (distance d), and up to the top of the pole (distance 9 ft). Now consider a second triangle: end of his shadow, back to the man (distance s), and up to his head ( distance 6 feet). These trangles are similar; that is, the length of the shadow is directly proportional to the distance from the pole. d / s = constant = 3 / 2 so at any time d = 3/2 s and d' = 3/2 s' The length of the shadow is always increasing at a rate of 3.3 ft / s.6. Why do so many people disbelieve in street light interference?Well I do not know . I used to notice it happening to me and then i seemed to stop noticing it ,but my husband now notices it whenever i am around he commented it to me the other day.I am inclined to think it is coincidence though. Go figure7. Do you have a timed street light that is always red when you come to it?yes and I hate it. I always sem to hit it when its red and have to wait the three minutes for it to change8. Why do people in the USA drive with their high beams on even when there is a street light? Why do they not lower the beam for incoming traffic?Because you know everything about people in the US and this is in NO WAY another ridiculous question based on a personal/limited experience that you are using as the basis for an extremely over-generalized assumption of the 320 million americans in this country, and how they drive
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