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What are the Characteristics of LED Car Lights?

Mar. 10, 2021
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LED car lights refer to car lights that use LED (Light Emitting Diode) as the light source. Because LEDs have the characteristics of high brightness, rich color variety, low power consumption, and long life, LEDs are widely used in the automotive field.

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1. Reliability and service life

2. Efficiency/lumens per watt

Compared with standard incandescent lamps, LEDs consume more light output per unit of electrical energy. But when compared with halogen lamps, the advantages of the actual light output of LEDs are not obvious. The latest LEDs have excellent lumens per watt values, but some values are obtained under optimized conditions, and are usually not obtained under the highest output conditions. Generally speaking, when the current of the LED increases, the light output does not increase linearly. Therefore, even if the LED outputs x lumens at 0.5A current, it will not output 2x lumens at 1.0A current.

3. Response speed

Taking brake lights and direction indicator tubes as examples, assuming that the vehicle speed is 125 km/h, that is, 35 m/s, the hot start time of the incandescent lamp is about 250 milliseconds, and the fast-reacting LED can be emitted about 8 meters earlier. Brake warning, thereby effectively avoiding car collisions. The same is true for indicator lights.

4. Directionality

Another key feature is the way the LED emits light. Unlike incandescent lamps, LEDs only emit light through one surface, which is good for headlights and aeronautical chart light applications, but may not be suitable for other lighting applications of cabin lights.

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