the uv leds you discuss give off both purple and ultra violet light, where as other leds give off mostly visible light. the total output is the same when you sum the output in all spectrums. therefore, when a UV active substance shifts SOME of that UV to visible, law of conservation of energy kicks in and the total visible light output cannot be greater than the purple+ the UV... ergo accounting for energy dispersal to other forms, the UV poi would be dimmer than comperable visible led poi
sorry, it would have been a great set of poi, if it worked.
slainte mhath