The difference between flash and fill light.

LED fill light lamp uses LED to fill light for the photographed object. Because of its low energy consumption and high brightness, LED lamps are generally used in camera phones or digital cameras to fill the light when the light is insufficient. Because the brightness of LED is much lower than the real flash, it can only play the role of "fill light".

The principle of LED flash lamp: LED does not emit light by jumping electrons inside atoms, but by applying voltage across the PN junction of LED, so that the PN junction itself forms an energy level, and then electrons jump on this energy level to generate photon emission. The service life of qualified LED under rated power should reach about 654.38+ million hours. If the mobile phone is designed to use LED driving current exceeding the rated current, the life of LED will be greatly shortened to thousands or even hundreds of hours.