lol the black lights would only make your grow room look kwel m8 lol... soz but they dont emit nowhere near the right spectrum of light to be used for growing.
In the electromagnetic spectrum you have alsorts of waves.....(Radiowaves, microwaves, infrared,- VISIBLE LIGHT -, u.v, x- rays and gamma rays.)
in order ... although i might have missed a few out there... neway the visable light is all we can see. the RED part of visible light ironicailly nearer to infrared is used for flowering while the BLUE part is used for vegein lol the wave length of the U.V is waaay to short for plants to use m8
sorry ...