Model number Tls-cw/50w-4c Voltage input Ac85;171;260v 50-60hz Color for the housing Black Power efficiency ;y87% with life over 40, 000 hours Total harmonic distortion ;¨¹ 9 % Power factor(pf) Input voltage =ac100v, pf;y0.99¡ê187;input voltage =ac220v, pf;y0.95 Power 50w Color rendering index Ra70-80 Light color Pure white Working temperature ;a40;230;;171;¡ê171; 55;230;/10%;171;95%rh Storage temperature ;a25;230;;171;¡ê171; 65;230; Protection grade Ip65 Housing and refector Aluminium Led chip Chimei(36*36) chimei(45*45) bridgeiux(45*45) epistar(35*35) Led working voltage Dc30-37v, constant current 2.8-3.0a Model number Tls-cw/50w-4c Carton box (l, w , h) 46*34*42.5cm Quantit