Blue lens for blood tracking does not work w LED... Why?

[jeff51]

Matt - Adventure Sports
Did a test of this a while back

TEST of Blood Tracking Flashlights!

Hi all, . . I decided to go ahead and test as many of the ideas as I could including Red, Green, Blue, Cool White, Warm White, 365nm UV, 415nm UV and Luminol. Plus combinations of those, hope you enjoy [Best Blood Trailing Flashlight Test] . . Let us know what you think which light is the best choice….

All the Best,
Jeff

Best Blood Trailing Flashlight Test