400W Osram Powerstar HQI-T 400/DTubular Single Ended Quartz Metal Halide400 Watt, E40 GES Cap, CCT 5200K on SON gear and 5900K on MH gearExcellent colour rendering Group 1A on SON gear and 1B on MH gearUse in enclosed luminaires only
400W Osram Powerstar HQI-T 400/NTubular Single Ended Quartz Metal Halide400 Watt, E40 GES Cap, CCT 3500K on SON gear and 4000K on MH gearExcellent colour rendering Group 2BUse in enclosed luminaires only
400W Osram Powerstar HQI-T 400/NSITubular Single Ended Quartz Metal Halide400 Watt, E40 GES CapOperates on mercury control gear with low pulse ignitorIdeal for floodlighting buildings