RE: primos bloodlight
I got one of the Gerber Carnivore bloodlights a few months back - same basic deal. Fortunately, didn't need it as everything I shot this year went down within sight. But I played with it a bit, and it appears to make the color red stand out pretty well.
I have heard some mixed reviews on these lights, though. Red blood on red leaves still doesn't leave you much to pick up with either light. When I bought it, I was kind of expecting something like the lights they use on CSI to find blood traces. Not that good, but better than a regular flashlight IMO.