I want to find UV LED's that produces not only strong but also wide range of fluorescence. I have built own lamp using Ebay 3W 365nm LED's expecting to get best quality clean UV light and was somewhat dissapointed. They do produce strong fluorescense of cellulose and phosphor based materials but rest looks like it is lit by dim white LED, they also get hot even with big heatsink so I figured out its had to come from UV radiation. I tested 14 of them and compared with 34W blacklight tube. 365nm LED's produce a lot lower material fluorescence range while blacklight tube has less wattage but produces significantly more fluorescence. I can so many invisible fluorescent things. I read that cheaper and longer wavelength UV LED's despite producing a lot of violet light also work better for fluorescesce. For example Chauvet uses 405nm LED's for club lights and works really great despite being so close to visible range. So can someone experienced with different UV light sources recommend which wavelength works best, 395nm, 405nm or maybe I need mixed LED's since blacklight tube emmits broader UV-A spectrum?