In this video, we’ll explain LED technology in an easy to understand way. We’ll cover the different types of LED lights, the different colors that LEDs can emit, and the different applications for LED technology and how they work.A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it.
source/image(PrtSc): The Engineering Mindset
Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor.White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device.Watch the video from The Engineering Mindset for more info:
LEDs have many advantages over incandescent light sources, including lower power consumption, longer lifetime, improved physical robustness, smaller size, and faster switching.
In exchange for these generally favorable attributes, disadvantages of LEDs include electrical limitations to low voltage and generally to DC (not AC) power, inability to provide steady illumination from a pulsing DC or an AC electrical supply source, and lesser maximum operating temperature and storage temperature.