Nowadays, people are doing many different LED-based modifications to their vehicles. One of these modifications is LED headlights. While there are a lot of benefits to using LED headlights, there are also some downsides.
It is hard to explain exactly how an LED works, long-story short, they rely on negative electrons moving against positive holes along a semiconductor. When an electron falls into a hole that is on a reduced energy level, it loses its energy. This lost energy is released as a tiny fraction of light (a photon). This process is called electroluminescence. This happens over a thousand times per second, creating a continuous bright light. This light is emitted from the ever-so tiny 2mm wide light emitting diode (LED).
The best pro to LED lighting is the energy consumption. You will see LED headlights in various hybrid car models which are based on electricity.
LED headlights are a very focused light source and are very customizable. If you look at most vehicles with LED headlights you may see the LEDs in a specific pattern or shape. LEDs are great for manipulation.
LEDs do not emit heat. However, like halogen headlights, they do create a small amount of heat at the emitter when electricity passes through. This creates a chance for other parts (assemblies and connectivity cables) to be damaged. This is why LED headlights require cooling like fans and heat sinks to keep from melting.
However, the cooling systems are typically located in a not-so-cool area, the engine bay. This makes LED lights more difficult to make for certain automotive models. This also explains why they are more expensive then other types of headlights.
However, LED daytime running lights and tail lights don’t use heat-sinks. This is because they are not necessary to see in the dark; hence why they do not need to be as strong as headlights.
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