The 30 Lumen – 3V LED Replacement Bulb is the perfect way to upgrade your old flashlight. This conversion bulb operates with any 2 cell – AA, C, or D – flashlight. It is a 10 year bulb and allows for 100,000 hours of use before any change is required. Thirty lumens of light output provides greater value and visibility to older flashlights. (41-1643)