Product Description : Osram M/40 Display/Optic 500 Watt 240V 64672 Halogen Single Ended Lamp MOL 85mm x DIA 22mm Rated Avg. Life 2000hrs Initial Lumens 8500 s90 Burn Position Rated Voltage 240 Volt Color Temp 2900K GY9.5 Prefocus Bi-pin Base LIF Code M/40 Country Of Origin Germany Osram Product Code #4008321098535 Used In Projection units, Photographic & Effect light. Only for Use in Approved Enclosed Halogen Fixtures Additional Information The color temperature of the lamps varies according to the application: 3400K for maximum luminous efficacy, 3200K for professional film and TV work 2900K-3000K for applications