Thanks @freeme 
Yellow dragon hair clipper
Okay, if not obvious from the pic above i made the last one a uv light. Triple seoul viosys 365nm, small reflectors from KD that i cut to fit, and a zwb2 filter. I wanted reflectors because some of the optics available restrict uv light.
I tried to look around for things to see during the day. I came across finger prints (or something) on a wall that otherwise looked clean.
I compared it to my only other uv light, a dqg 26650 that i did an emitter swap, stock optics are used. I don’t recall the exact emitter but I’m pretty sure they are 395nm. During the day the difference was the dqg had a significant purple tint while the yellow dragon had a pale blue tint… BUT when it’s dark there is a world of difference…
