Mossberg 500 Rail mounted light

I've got a mossberg 500 tactical shotgun with an 18 1/2" barrel. I'm looking for an inexpensive tactical light to mount on a weaver rail. This weapon is for home defense but gets used quite a bit at the range. Flashlight must be able to withstand the shock. I am a firm believer of "you get what you pay for". But if it's inexspensive and works great I'll take it. What you got?

Try the Streamlight TLR1. It's among the very best ever made, and you can attach a battery door and remote pressure pad if you wish.