I use a propane lantern. It puts out a bunch of light and makes the blood easy to see.

tylertool.com has the carnivore lights for $36.72 and the headlamp for $28.08, on sale.

I did a post in the deer hunting section about this light. Only got a few responses,but majority said it wasn`t worth the $. On another web site, the guys said they liked it. Who knows?