400W Philips Master HPI Plus BU 400W/743Elliptical Quartz Metal Halide400 Watt, E40 GES Cap, CCT 4300KColour rendering 69%Use in enclosed luminaires only
400W Philips Master HPI Plus BUP 400W/743Elliptical Quartz Metal Halide400 Watt, E40 GES Cap, CCT 4300KColour rendering 69%For use in open luminaires
400W Philips Master HPI Plus BUS 400W/743 Internal Ignitor (direct MBFU retrofit)Elliptical Quartz Metal Halide400 Watt, E40 GES Cap, CCT 4300KColour rendering 69%32,500 Lumens, use in enclosed luminaires only
400W Philips Master HPI Plus BUSP 400W/743 (direct MBFU retrofit)Elliptical Quartz Metal Halide400 Watt, E40 GES Cap, CCT 4300KColour rendering 69%32,500 Lumens, for use in open luminaires