About the Light Source of Solar Lights

How much do you know about the light source of solar lights? Here are some FAQs to help you know more about solar outdoor lights.

1. What is LED?

Led is taken from the abbreviation of Light Emitting Diode three words, the Chinese translation is "light-emitting diode", as the name suggests, the light-emitting diode is a kind of electronic device can be converted into light energy has the characteristics of a diode.

2. What is the basic structure of LED?

The basic structure of LED is a piece of electroluminescent semiconductor material, placed on a lead frame, and then sealed around with epoxy resin, to protect the role of the internal core.

3. What is luminous flux?

Point light source or non-point light source in the unit time of the energy emitted, which can produce visual people (people can feel the radiation flux) is called luminous flux. The unit of luminous flux is lumen (abbreviated lm), 1 lumen (lumen or lm) is defined as an international standard candlelight source in the unit stereo arc angle through the amount of luminous flux.

4. What is illuminance?

It can be measured directly by an illuminance meter. The unit of illuminance is lux, which is the phonetic translation of lux in English and can also be written as lx. The illuminance of an object that is uniformly illuminated by light is 1 lux when the luminous flux obtained on 1 square area is 1 lumen.

5. Please explain the difference between luminous intensity and luminous brightness?

Luminous intensity is referred to as luminous intensity, the international unit is candela (candela) abbreviated cd. LCD refers to the luminous flux emitted by the light source in the specified direction within the unit stereo angle. When the light source radiation is uniform, the luminous intensity is I = F/Ω, Ω is the stereo angle, the unit is the spherical degree (sr), F is the luminous flux, the unit is lumens, for point light source I = F / 4 or so.

Luminosity indicates the brightness of the luminous surface, refers to the luminous intensity of the luminous surface in the specified direction and the ratio of the area of the luminous surface perpendicular to the specified direction, the unit is candela? square meters. For a full scattering surface, although the light intensity and luminous flux in all directions are different, but the brightness of each direction is equal. The fluorescent screen of the TV is approximate to such a full scattering surface, so the image viewed from all directions, have the same sense of brightness.

6. What does the color rendering index refer to?

The degree to which the light source presents the object, that is, the degree of color fidelity. Often called the "color rendering index" unit: Ra.

7. luminous efficacy and wattage and lumens of light system?

Luminous efficiency: the luminous flux emitted by the light source divided by the power of the light source. It is an important indicator to measure the energy efficiency of the light source. Unit: lumens per watt (lm/w).

8. What is the general color temperature of the solar street light?

About 6500k

9. From the perspective of luminous flux and luminous efficiency, please explain why solar LED lights 10w brightness equivalent to the brightness of incandescent 100w?

High luminous efficiency LED beads can now do 180LM/W incandescent lamp between 5-15LM/W The luminous flux of a 10w led is 1800LM, the highest luminous flux of a 100w incandescent lamp in 1500lm, so that a 10w led lamp is equivalent to a 100w incandescent lamp brightness.

10. Please combine the lithium battery voltage and the basic controller principle to explain why flat-pressure solar lights are suitable for low-voltage high luminous efficiency lamp beads?

Take lithium iron phosphate battery as an example, because the voltage at 3.2v, the voltage is low, we know that the formation of current must have a pressure difference, the lower the voltage of the lamp beads and the higher the pressure difference between the battery, so that the formation of the current is also greater, the corresponding conversion of the battery's electrical energy into light energy efficiency is also higher. In other words, low-voltage lamp beads can improve the brightness of the lamp and the conversion efficiency of the battery.