Lighthouse one
Flashlight Enthusiast
Garrity makes 2,3,and 4 cells xenon bulbs. 2 pack for only $2.25! I found them at my local hardware store. Just tried them out and they work the same as the Radio Shack #103 bulbs. HPX20-30-40 the HpX30 is the one for a 4 c cell setup. Didn't try online...but www.garritylites.com is on the package.