awesome information, I usually use a few different lights when I blood trail, I have a fenix headlamp and a fenix handheld. I keep a incadecent light in my pack at all times. Why? Well, LED lights are great unless fog or smoke, then it just whites out, having high beams on in fog, (why firemen use them), I found this out the hard way tracking a trail in fog one morning. If I had a choice of a light for tracking a blood trail, it would hands down be a coleman lantern, but hard to carry one hunting.