1. Reliability and service life

The expected lifespan of led car lights is 50,000 hours, compared to 20,000 hours for halogen lamps and 3,000 hours for tungsten incandescent lamps. Compared with incandescent lamps, LEDs are sturdy and less susceptible to vibration, and the light output brightness will not be noticeable during use. decline. Lighting solutions based on multiple LEDs also have the benefit of being "redundant" in that even if one LED fails, the lighting device can still be used.

Correct use of LEDs (especially correct control of the temperature of LEDs) can effectively prolong the life of LEDs. On the contrary, if the temperature is too high, it is easy to damage the LEDs. The application of LEDs in automotive lighting also involves a lot of legal definitions, and most countries have clear definitions for brake lights or headlight failures (lights on or off). But with lights that use multiple LEDs, it's difficult to define exactly whether the lights are broken, and manufacturers and legislators are defining how LEDs are used.

2. Efficiency/lumens per watt

Compared with standard incandescent lamps, LED car lights can produce more light output per unit of electricity consumed, but compared with halogen lamps, the actual light output advantage of LEDs is not obvious.

The new LEDs have excellent lumens per watt values, but some values are obtained under optimized conditions, usually not at the highest output conditions, generally speaking, when the current of the LED increases, the light output does not increase linearly, So even though the led outputs x lumens at 0.5A, it won't output 2x lumens at 1.0A.

3. Response speed

Take the brake light and turn signal tube as an example, assuming the vehicle speed is 125km/h, that is, 35m/s, the hot start time of the incandescent lamp is about 250 milliseconds, and the fast-response LED can issue a brake warning about 8 meters in advance, thus effectively avoiding the car. Crash, and so does the indicator light.