I’ve been a user of Luminlay for a number of years. Very content and, in my opinion, a worthwhile upgrade. The luminosity is enough on dark stages without that “look at me” element that some LED setups have. I don’t use a UV lamp regularly and they still work in a subtle, useable way.
The original Luminlay product from Japan is expensive. Other products are out there (e.g. Glowtech stickers) that I haven’t tried. These may be good as well, and they may be cheaper. “You pays your money”, as they say.