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Cooling requirements for LED headlights

Time: 2018-10-22

The power density of modern LEDs makes it possible to use this type of lighting in car headlights. But like any other electronic device, it needs to work at a certain temperature range. 

It is well known that ambient air is the most suitable coolant. A fan built into the headlamps can precisely apply this air to heat dissipation or other needs. The latter is also important for LED lights. Depending on environmental conditions, moisture in the air can collect in the unsealed headlight housing. This blurs the reflector and lens. Since the level of waste heat is lower than that of a conventional halogen lamp, if the (waste) air is accurately transported in the casing, the water only evaporates. Therefore, the fan used assumes a mission that is critical to the reliable operation of the headlights as well as the pure cooling function. This requires operating noise to be kept to a minimum. An aerodynamic impeller with a winglet or a wing-shaped profile contributes to further development.

But also pay attention to other things, the operating temperature range of the LED bulb is between about -40 ° C and + 120 ° C. It also needs to adapt to various climates, such as high humidity and high salt content, as well as dust in the air. When driving, you must also pay attention to additional vibration, shock and impact stress as well as electromagnetic effects. The fan needs to be able to withstand these while having the most compact structure. In addition, the materials used also need to be durable.

If the fan is mechanically stable with maintenance-free bearings and is made of antifogging materials, the next problem is the operating parameters.For example, the vehicle's on-board electronic equipment changes the speed to adjust the air flow.It's safer.


The design principle of modern LED headlights requires reliable cooling function.LED lights are required to be firmly installed on the vehicle, ensuring reliable heat dissipation and allowing trouble-free headlights to operate for more than 10 years.Tight integration of optics, electronics and cooling in LED headlights requires all experts to conduct early design consultations to ensure optimum results in terms of economy and lighting efficiency.