Sylvania 58755 Tungsten Halogen Lamp 120V 100W T4 Halogen light bulbs have a longer life and a higher light output than incandescent bulbs Halogen bulbs have a whiter and brighter light and less blackening, dimmable with most dimmers Applications: interior, interior recessed lighting, track lighting, security lighting Osram T4 halogen bulb, 100W, 120V, Base: BA15d Double Contact Bayonet, 2950K, Rated Life (Hr): 1000, Luminous Flux (LM): 1900,