... .Lumen:1800lm 3.SMD 3014/3528 led 4. CE&ROSH&C-TICK &PSE 30W SMD3528 600*600mm LED panel light 1. Input Voltage:AC85V ... Temperature:2700-3500K/ 4000-5000K/ 6000-7000K9.Working Temperature:-30°C~50°C10.Lifespan >50000 h11.Material:ALUMINUM/SPCC/PMMA12.IP4113 ... ,school,gym,museum,workshop,department store,hospital,exhibition hall,etc.LED panel light for offices: