Nite Ize LED Upgrade Bulb for C/D Flashlights, 55 Lumen Bulb FLASHLIGHT LED BULB - Convert most C & D 2-6 cell PR style flange incandescent flashlights into bright, long lasting flashlights with this flashlight upgrade bulb, Maglite upgrade bulb or replacement flashlight bulb, with LED technology. FLASHLIGHT UPGRADE BULB - Flashlight bulb burn out? Make a quick and efficient upgrade with this LED replacement flashlight bulb, by popping it in the same way you would a conventional bulb. ENVIRONMENTALLY FRIENDLY - The LED technology in this flashlight LED bulb offers a much longer battery life, making it an economically and environmentally smart choice as a Maglite upgrade bulb, general flashlight upgrade bulb or replacement flashlight bulb. BRIGHT LED LIGHT - Light your way with pure white light and the 55-lumen output of this flashlight LED bulb, as opposed to the dull yellow of incandescent bulbs. LONG-LASTING - The Nite Ize flashlight upgrade bulb is long lasting and reliable, offering an estimated 100,000 hours of use.