I shelled out $50 for the new magical gerber blood seeing light. Arrowed a doe at dusk,and was very exictied to use this new spooky light. Bottom line... it's a joke. I found that my 60 lumen surefire showed much more visable blood than my new 'csi' wonderlight. When the blood trail thinned out and I was tracking blood spot by blood spot on my hands and knees, I would find a small spot with the surefire and then try to find it with the gerber, inches from my face and often could not. Save your money, this one's a fraud.