PR16 Standard Flashlight PR Replacement Light Bulb: Description - Standard replacement flashlight bulb - 12.50 Volt - 0.25 Amp - B-3-1/2 Single Contact Miniature Flanged (P13.5S) Base - C-2R Filament Design - 2.7 MSCP. 50 Average Rated Hours, 1.25" Maximum Overall Length, - 0.45" Maximum Overall Diameter - Typically found in 12.5 volt Hand Spots.PR16 Standard Flashlight PR Replacement Light Bulb