1. The color of the show The LED illumination that is light emitting diode lighting is the use of solid semiconductor chip as luminescence materials, in a semiconductor compound released by carriers happen excess energy and cause photon emission, an immediate red, yellow, blue, green, green, orange, purple, white light. 2. The principle of lighting LED by Ⅲ-Ⅳ is family compounds, such as GaAs (gallium arsenide), GaP (phosphating gallium), GaAsP (P gallium arsenide) made of semiconductor, its core is the PN junction, with a general P-N "of I-N characteristics, namely is the guide, reverse globe, breakdown characteristic. Under certain conditions,, electronically by N area into P area, hole by P area into N area, into each other area of minority carriers (ShaoZi) with majority carrier (many children) composite and shine.