The LED Traffic Signal Light is save-energy product which is used cold light source and super high brightness LED. The feature are good vision uniform luminance normal chromatogram low consume long life etc. LED lamps use and connected in series to avoid the possession of a LED necrosis arising. LED controls are not a bunch of bright, beautiful light modules, uniformity. LED screen using spectrophotometry automatic sorting machine, Photoelectric parameters. In optical we seriously study the LED lights luminescence properties and skills with LED lights, in order to increase the uniformity of the whole lights, while overcoming a mosaic phenomenon