... . 3:height 20~30M ApplicationMainly used for factory, industrial sites, stadium, gas station ,park, waiting room, train station, port pier, ... shatter proof glass, impact resistance, abrasion mask high quality CREE LED, stablity, life span 50000 hours, 10 times longer than ... index, more real for the physical color, can select LED's color temperature6adopt meanwell driver's constant current and voltage ...