"These black lights for reptiles are NOT the black light tubes used for lighting fluorescent minerals, posters, and psychedelic paraphernalia (often called BLB lights). Fish/aquarium and plant 'grow' lights, either incandescent or fluorescent, do NOT produce UVB. You need a black light which emits light in the 290-320 nanometer range."

there we go, and off a reptile site too.

wonder if you can buy leds in that sprectrum?