Elevate your old flashlight with the 40 Lumen LED Replacement Bulb, designed to fit any 3 cell, 4 cell, or 6-volt lantern or flashlight. With a 10-year lifespan and an incredible 100,000 hours of use, this bulb offers enduring performance without the need for frequent replacements. Experience a brighter and more visible output of forty lumens, enhancing the value and functionality of your trusted flashlight. Upgrade now and enjoy improved illumination for years to come.