I re-read the threads "Best Light for Deer Hunting" and "Blood Tracking - Blue Best." Here's what I picked up.
Rothrandir says Royal Blue Luxeon will emit "some little UV." I think UV is not relevant to tracking unless you are going to sprinkle the woods with reactive agent. /ubbthreads/images/graemlins/frown.gif Only useful if you want UV for other purposes. Also I suppose UV not healthy to eyes, yours and others. I gather it's the high frequency wavelengths that irritates.
EMPOWERTORCH found that the blood from a roast under a Cyan torch clearly darkened.
Hotfoot's source says that light at 415NM is best for detecting blood splatter, w/o agent.
Everyone agrees Royal Blue will make blood stand out the most.
Some thought a Surefire E2 w/blue filter was good, also multipurpose. It occurred to me that the filter blocks out all the light but blue--so you are wasting energy, plus, since that post, 1W Luxeons on lithium have become available emmitting 226 lumens I believe, possibly more light than a Surefire w/filter (can anyone (dis)prove this?)
Also occurred to me that a Blaster might blast out so much light that the animal, if alive and bleeding, might pick up and flee way ahead of you. Deer apparently can't see or won't spook at green or red, but what about Yamaguchi's Blue Blast--Terror of the Night?! /ubbthreads/images/graemlins/grin.gif The Blaster is also one big hunk of metal and batts, yes?
Always hard to know if the deer has died yet--you're playing a game of wait and move. Might be better to have less output if indeed the deer is getting spooked.
The Inova X5 blue may be well made etc, but it's way less output than a Lux, pricier up front and to run, and in some ways less versatile given Mag accessories and swappability.
Considering everything I think a Badboy 400 or InReTech, Royal Blue, on lithiums, is the way to go. I'd favor the InReTech for a longer runtime in case you are out all night, but I'd use the McFlood for a wide pan.
Of course it might be nice to have an Arc AAA for redundantcy, for your partner--ahem, I meant hunting buddy--or just for it's own sake! (Credit here to the aphorism: "What is your major malfunction, maggot, buy both lights!") /ubbthreads/images/graemlins/eek.gif
Oh, yeah, what about the Streamlight 3AA Luxeons coming soon? I'll email them, find out if we'll be seeing any Royal, Peasant, or Turcky Blues. . . .