Are led headlights hotter than halogen lamps? Do LED headlights need a dust cover?

Since the luminous principle of halogen lamps is to generate heat after the tungsten wire is energized, generally there is no radiator and rely on its own thermal radiation to dissipate heat; while LED headlights use solid semiconductor chips as luminescent materials, and photons are caused by the recombination of carriers. It emits and emits light directly, and the operating temperature is generally lower than that of a halogen lamp. But the heat dissipation effect of most led headlights is not good, if there is no auxiliary heat dissipation, it may be hotter than halogen lamps.

Compared with halogen lamps, led headlights are brighter and more energy-saving, but their penetration is poor, and some products do not have a good heat dissipation effect. However, many led headlights on the market now adopt a radiator + fan heat dissipation method. The heat will be conducted to the radiator through the copper substrate, and then the fan will rotate at a high speed to form wind pressure and form high-speed convection, thereby taking away the heat. This method is also the mainstream automotive led headlight heat dissipation method on the market at present, with better heat dissipation effect, and also makes the performance of the led headlight more stable.

Since many led headlights are equipped with aluminum alloy on the rear and a fan to dissipate heat, generally the car needs to be covered with a dust cover after the bulb is installed, and the dust cover is sealed, but the cover will cause loss of convection, and it will not be able to Heat dissipation. Therefore, many car owners worry about whether or not a dust cover is required for led headlights. First of all, the dust cover is to prevent the car lights from fogging or entering dust and water. This is definitely necessary. We can use a general-purpose dust cover, which is a kind of LED headlights that can expose the heat sink or fan. Dust cover, in this way, solves the problem of dust prevention, also solves the problem of heat dissipation, and provides a better heat dissipation environment.