Definition of LED bulb

LED stands for Light Emitting Diodes, which means light emitting diode.
⁠LEDs emit light when current flows into semiconductor devices, so they convert electrical signals into light.
⁠Initially, it was mainly applied to brake bulbs and interior lighting due to low light levels,
but due to the development of LED light sources, high-light LED was developed and used as headlamps for high-light and headlights.
⁠It is common for LED headlamps to use two light irradiation principles to obtain a beam pattern.
⁠First, there is a way to reflect light from the LED light source to the Reflector
and second, investigate light directly from the LED light source through the Projection lens.
⁠For the small size of the LED light source, both methods can be used to match the design of the car.