... FeaturesLED lifespan: 50000H almost 50 times than incandescent lamp,5 times than current conventional CFL, maintenance free ,more convenient ... PC,through Multy-refection&refraction,lighting very comfortable,uniformityPurity 99.5% Aluminum alloy wiht Anodic oxidation surface treatment,thermal conductivity ... panel in an Inner box, one master carton contain 5 inner boxesInner Carton Size: 66.5CM X 62.5CM ...