When choosing a flashlight for hunting, be sure to consider the lumen output along with beam range. A flashlight with a lumen output of about 1,000 lumens along with a beam range of about 1,000 feet will give you sufficient light for hunting. A flashlight will multiple brightness levels is also a good choice and gives you more versatility. This allows you to lower the brightness level for close-up tasks. A rechargeable model may cost more initially, but will be most cost-effective in the long run. A few great options are the Streamlight ProTac HL-X now available with a USB rechargeable battery, and the Fenix TK35 Long Range Flashlight.

Hunting Flashlights, headlamps and lanterns
Flashlights, Headlamps and Lanterns for Hunting