LED Upgrade Flashlight Kit, Converts Most "C" & "D", 2 To 6 Cell PR Style Flange, Incandescent Flashlights Into Bright, Long Lasting, 100,000 Hour, LED Flashlights, As Easy As Replacing The Bulb, 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, Ensures A Much Longer Battery Life, Making It Not Only A Useful, Versatile Improvement, But An Environmentally & Pocketbook Friendly.