Electric lighting began to be developed many years ago and continues to be refined in the present day – Getting SMARTER. Lighting technology is broadly classified mainly into four types of lighting; Incandescent, Fluorescent, Halogen, LED (Light emitting diode). Each produces light using a different technique and each is manufactured a different way. Among these four technologies, LEDs are the most popular form of artificial lighting and are essential to modern society. There are of course other lighting technologies but less commonly used, including neon, argon, plasma, oil, carbon, carbide, metal halide, sodium vapour and xenon.