I upgraded a couple of older Surefire 6P and G2 incandescent bulbs with some SolarForce (HK) LED modules for about $15... additionally assembled a couple of lights with their L2M bodies, add a module, and a couple of CR123s, and you have a "tactical" light for under $35... the 320 lumen has a center throw, and the 820 lumen a serious gob of light... Lighthound is a couple of bucks higher, but doesn't take 2 weeks to get shipment from Hong Kong...

http://www.lighthound.com/