This is a GE EHJ 250 watt 24 volt halogen bulb. It has a base of G6.35 2-pin which can be used in Residential Lamps, Desk lamps, Hanging Lights, and more. it has a color temperature of 3400k, a diameter of 0.50 inches and a filament of C-6. It's lamp finish is clear, it has a lumens of 8000, and it's maximum overall length of 2.25 inches. This GE EHJ 250 watt bulb also has a rated life of 50 hours.