Is It Worth to Put Led Lights in Car?
Improving visibility is a major concern for many drivers. Hence, you may be evaluating changing your lights for ones that offer a greater vision, such as led lights, but is it possible to mount them in a car? Currently, we can find halogen, xenon, or LED lights. Having a good light is very important to offer greater security. A clear difference made between exterior lighting is the lights that are outside the vehicle and whose objective is to indicate the presence of the car and offer better visibility to the driver. On the other hand, interior lighting is the one inside the car such as a 921 led bulb.
If you compare the old incandescent bulbs with modern LED bulbs, there are numerous differences. Often only the efficiency is considered, the significantly higher efficiency of LEDs and possibly the better color temperature of the light. Modern semiconductors are now achieving efficiencies that are around four times higher than those of halogen headlights. In numbers, this is currently around 90 lumens per watt, which corresponds to about a 75W incandescent bulb or a car headlight with 55W halogen bulbs. The high luminance, generated on the smallest chip area, means a high local heat load in the chip.
Even with a physical efficiency of an LED of currently around 30% on the chip plus the losses in the optical sealing compound and the ballast module, there is significant heat generated. The amount of heat to be dissipated quickly adds up to a few watts even in an energy-saving LED headlight housing with several LED chips. Since semiconductors generally drop in efficiency at an elevated temperature. LED substrates also suffer from a drop in efficiency as the chip temperature rises—the lifespan decreases. Different limit values apply depending on the chip type. A life expectancy of 100,000 hours (11.4 years) in an overheated working environment quickly becomes 1,000 to 30,000 hours.
The same applies to the components in the ballast. For example, if the temperature drops by only 10 ° C, the lifespan of electrolytic capacitors can double. 5,000 h at 105 ° C will become around 40,000 h at moderate 75 ° C. For another reason, there is an imperative for a reliable cooling process: For legal reasons, modern headlights may only supply as a compact unit that does not permit component replacement. According to the internationally applicable ECE specifications, LEDs for automotive technology may only install as modules in cars. It means that the diodes must encapsulate in a tamper-proof component.
A full LED future (waiting for the right laws)
However, the market for traditional bulbs (halogen and xenon) is still thriving and promises to grow steadily for a few more years. The peak should be reached in 2020 and then see a gradual replacement of the fleet of lights in circulation with those with LED technology.