Nite ize high power led upgrade kit for c or d cell description the nite ize 1 watt led upgrade kit converts most c d 2 6 cell pr style flange incandescent flashlights into super bright long lasting 50 000 hour led flashlights its as easy as replacing the bulb and instantly your flashlight will emit a pure white as opposed to the incandescent dull yellow light in spot to flood focus self adjusting for all capacity levels this efficient led technology also conserves battery