The Maglite magnum star II 4C- or D-cell battery xenon replacement flashlight bi-pin lamp is designed for use with Maglite 4 C and 4 D-cell flashlights. The lamp uses pressurized xenon gas for improved efficiency. It is tougher and brighter than standard flashlight bulbs. High intensityGet up to 3 times the range and 2-1/2 times the life of standard PR bulbsFor Alkaline batteries onlyMag-Lite C & D size4 cell