I pulled out a black light this evening and was amazed at what I found.... Some of the clothing had no flourescents while other pieces glowed bright. I had to order the UV Killer and will give it a try. Now whether it makes a difference to what deer actually see the jury is still out for me. I have made several inquiries with independent professors who know a lot more about how the eye works and how UV, IR, rod and cones, and all that vision stuff works. Once I get a response I will let you know if interested.