Go to walmart, in the flashlight section by the outdoors stuff. They have a black & decker flashlight that is small with a clip. It comes with a Green, Blue and a Red lens. I use the green lens so nothing spots it from a distance. This flash light is only like ten bucks and works really good. It fits good in your pocket and clips so it doesnt go anywhere too.
I recommend the MAGlites. Quality product made in the US. I quit buying the cheapies and have not regretted my decision.
Mag lite flashlights, a few sizes and two head band lights in the pack, I don't know the brand and am to lazy to check but keep extra batteries for these and usually get replacement head lights from the outfitter stores mid year.
I only use my cell phone light if I need light to walk to/from the stand but I typically walk in the dark. I have never had to track a deer at night but if I ever need to I have an LED gas station brand flashlight.
The best light I've ever owned is the EagleTac G25, I have it mounted on my AR but pull it off during hunting season. That thing is crazy bright, I only use it for tracking. To and from the stand I use a cheap head lamp.