I use some UV materials -- mainly nymph dubbing -- and have had some success with them.

However, I ran across this recently which basically states that trout cannot see UV light and hence UV materials. He does however, like fluorescent materials.
https://www.youtube.com/watch?time_c...&v=77QFATapVN0

It seems like I've heard the same view from others on this forum, so maybe they will explain further.