1. High brightness SMD3528 chip 2.Optical-grade light guiding board and light board 2 white, biue, red, green are optional LED high ... cold light source, the epoxy resin packing, light body and no loose parts, there is no filament burn, thermal deposits ... more effective. No ulraviolet and infrared spectru, quantity of heat low frequency and no flash, no radiation, and waste recycliing, no pollution ...