PR15 Standard Flashlight PR Replacement Light Bulb: Description - Standard replacement flashlight bulb. 4.82 Volt - 0.50 Amp - B-3-1/2 Single Contact Miniature Flanged Base (P13.5S) - C-2R Filament Design - 2.0 MSCP. - 30 Average Rated Hours - 1.25" Maximum Overall Length - 0.45" Maximum Overall Diameter - Typically found in 6.0 volt lanterns. PR15 Standard Flashlight PR Replacement Light Bulb