supply LED Traffic Light (guide board display, arrow light, LED caution stake) With the aluminum die casting shell and special honeycombed compound eyes optical system, our LED traffic signal lamps are outstanding with good visual angle, equal light intensity, standard chromatogram and long service time. Human-based design, the lamp is easy for dismounting, installation and debugging. It uses high reliable LED ensured by strict aging test. Every LED is exceptionally exchangeable. Features: 1) Materials: die-casting aluminum 2) Luminous intensity (CD/m? arrow 4,000, round 400) 3) Operating voltage: AC 220V 4) Chromaticity: a) R: 618nm - 630nm b) G: 495nm - 508nm c) Y: 585nm - 598nm 5) Dimensions of light: 300mm, 400mM