I used one this year after we had already found the animal. This way I knew the path of the animal so we followed where we knew the animal had gone to see the difference between what we have been using and the new *blood light*. We always track with a bright white light and have for years. I dont know if it was just different or just bad, but I found the blood easier with the bright white light far better than the *blood light*. I can also tell you that LED lights are terrible to track with. For me its the light itself. The LED puts off a light which does not show color difference like a bright white light does.
For me, the brightest pure white light I can use is the best source to find tracks and blood during night tracking
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home furniture
mice in garage