I've done a whole lot of trailing (hands and knees with flashlight) and I guess anything that would help, even a little would be appreciated. I've been wondering about those lights (looks like blue and red leds). Don't know whether to believe the advertising.

Roskoe, did you compare it to a regular bright flashlight in the dark?

I've also seen that CSI stuff (Blue Star). It seemed stupid at first, but the more I thought about it the more it might pick up small flecks of blood or blood mixed with water (after or during a rain), turning them bright blue. I saw in Sportman's Guide where you could buy 8 tablets to make 32 ounces for $18 bucks. I guess if it picks up small particles it could be good for finding the beginning of a trial and the direction. I might try it.