Ever Bright 3Watt light bulb is a great upgrade your flashlight! High power and a high lumen rate (180lm) will allow you to replace the old light bulb in your flashlight, thus extending the battery life! Indeed, LED lights consume much less power than the standard incandescent bulbs or gas-bulbs in Mag-lite flashlights, and it will let you save on the purchase of new batteries! Wide voltage range of this bulb allows its use in many Mag-lite flashlights - from 3 to 6 cells of both D type and C type! A high lumen rate guarantees that your flashlight will be even brighter than it used to be! Ideally for long time operation, like camping, hunting, mining and other longtime operation!