I've got a Sig STL-900L laser/light with strobe. Good light, cost me less than $100. I keep it on my nightstand gun. They're tough to find for that price, and a lot of places are asking $200+ for them. I don't think I'd pay that for any light.
Unless it's purely for a HD/nightstand type of gun, I prefer to keep the light separate from the gun and generally dislike any rail-mounted contraptions. Costco has 3-packs of 200 lumen "tactical" flashlights for like $15-20. They're very good little lights.
My nightstand setup: