Well, I tested out the ATI ProColor bulbs I bought. I started with 4 plants all 4 inches tall. I put 4 procolor and 4 spectralux bulbs into an 8 bulb 2 foot T5 sunblaze and vegged for 10 days. The plants grew 24". The leaves are about 10" in diameter! They stretched like crazy however, but I have never seen anything like this before. Absolutely insane! Would NOT recommend for vegging due to the stretch, but WOULD recommend for flowering due to the HUGE SIZE OF THE FAN LEAVES! I know they are discontinued, but they are just PINK bulbs. Nothing more. These pink bulbs are available from about 3 other companies. They are "PLANT GROW" bulbs. Basically, red, white, and blue color light in one bulb. They also come in the compact florescent version, but they are identical to the aqua medic plant grow and zoo med flora sun. I have found the flora sun's to be very unreliable however. Anyway, for sure add this bulb to your flowering regimen. My next experiment will be to combine 4 ProColor and 4 Ati Blue Plus to veg with to see if it will control the stretch and still produce huge fan leaves and an extreme growth rate.