So far, auto lamps have developed from original candle lamps to generally utilized incandescent lamps. In recent years, new-kind HID (High Intensity Discharge) and LED lamps have also emerged. The LED luminous efficiency can reach 80%-90%. New-sort and intelligent LED lamps, which are called the fourth-generation auto light source, have grow to be an outstanding member amongst global auto electronic goods and will be the new development orientation of auto lamps.
Compared with traditional lamps, LED lamps have much longer service life. Its service life is 50,000 hours in theory and 20,000 hours in practice. During the entire life span of vehicles, users normally do not need to replace the LED lamps. The commence time for LED lamps is only dozens of nanoseconds, much shorter than that of incandescent lamps. Thus, drivers can have far more reaction time. LED quit lamps and directional lamps can directly convert the electric energy into optical energy under low drive current, showing upstanding environmental protection and energy saving effects. Its drive existing is only 1/four of that of incandescent lamps. With small size, LED can facilitate designers in changing the lamp shapes optionally to diversify the auto styles.