As LED technology has been widely used as a new generation of lighting technology in recent years, LED lights are currently used in most lighting places. LED lighting applications include LED flood lights, LED wall washer lights, LED tunnel lights, etc. Application in lighting places. In the process, the power of LED lamps is gradually increased to meet the demand for lighting, so the heat dissipation problem of LED lamps has been paid more and more attention. This is because the light decay of LED or its lifetime is directly related to its junction temperature. If the heat dissipation is not good, the junction temperature will be high and the life will be short. The following Baite lighting takes everyone to see what is the cause of LED heating?
 
The reason why LEDs generate heat is because not all of the added electrical energy is converted into light energy, but part of it is converted into thermal energy. The light efficiency of LED is currently only 100lm / W, and its electro-optical conversion efficiency is only about 20 ~ 30%. In other words, about 70% of the electrical energy is turned into thermal energy.
Specifically, LED junction temperature is caused by two factors:
1. The internal quantum efficiency is not high, that is, when electrons and holes are recombined, photons cannot be generated 100%, which is commonly referred to as "current leakage", which reduces the recombination rate of carriers in the PN region. The leakage current multiplied by the voltage is the power of this part, which is converted into thermal energy, but this part does not account for the main component, because the internal photon efficiency is now close to 90%.
2. The internally generated photons cannot be completely emitted to the outside of the chip and finally converted into heat. This part is mainly because currently called external quantum efficiency is only about 30%, and most of it is converted into heat.

How to install LED flood light

Remove the case, separate the materials, and follow the steps

1. Apply the thermal paste evenly to the heat sink inside the case;
2, and then install the chip in the shell of the thermal paste;
3. Use two wires to solder the two ends of the chip to the back of the shell.
4. The two wires left are connected to drive positive and negative poles;
5. Put the double-sided adhesive for the driver into the power supply box for installation;
6. After the shell is installed with a waterproof rubber ring, fix the back cover with screws, and the back is basically completed;
7.The front of the chip is covered with glass after positioning with a reflector
8, and then use the screw and waterproof rubber ring to make a waterproof effect for installation
9.After the installation components are completed, you can install and use.