Nite Ize Led Upgrade Kit Rechargeable 55 Lumens Lithium Ion White 55 Lumen Output (Estimated Max Lumen output only - actual performance depends on operation conditions, cells used and flashlight.) Fits Most 2-6 cell C&D cell flashlights - PR Flange Style. Simple to Install - As simple as replacing the original bulb. Environmentally Friendly- Minimizes battery waste and bulb replacement waste Lighting the way for our sustainable future! Save money on replacement batteries and bulbs.