The principle objective of this article is to know about Light Emitting Devices. The improvement in light emitting devices didn’t end there. Tube light came in as Industrial lighting, with fewer electricity consumption. Halogen came in which can provide high strength lights. Sodium vapour lamps came as a answer to road lighting. CFL (Compact Fluorescent Lamp) got invented and they became major stream light source universal because of its fewer power consumption.
Evolution of Light Emitting Devices
