Technical Specifications： GL-C50 GL-C50S Base Material:Aluminum/Aluminum Aperture Cover:Silicon gel/Silicon gel Power:50W/50W Lumen:3500-4000LM/4000-5500LM CCT(k):5500-6500/5500-6500 Ra(%):80%/80% Operating Temperature:-20°c-+45°c/-20°c-+45°c Dimensions:50x40x4.3mm/50x40x4.3mm Weight:20g/20g