Quote Originally Posted by RackitMan
Did you overdrive your T5s (how did you do it?) or did you purchase them overdriven?

Also saw an older fluorescent light spectrograph, though I imagine it has not changed very much. Very interesting is that the warm white actually has more blue than the cool white. What makes the cool white look bluer is more green and yellow. This is backward to almost everything posted here, but check it out for yourself. (Link is currently not working for me: www.weedfarmer.com/cannabis/lights.php ) The cool white has much more red light.
I used before and I'm using now a fluorescent ballast made by IceCap inc. They are capable of driving T12, T8, T5 to VHO levels and can be used to power up non-ballast cfls like TT-105s.
As a matter of fact, this time I bought one of their T5 "retro kits" that comes with the ballast, end caps (water proof ends), stand offs, reflectors and wiring harness. I'll be building a frame out of aluminum channel, that will also hold the Ti SmartLamp.

I failed to mention before that the only downside is bulb life is shorten.

I think the trade off is good. For me the biggest up side is the ability to light a 4'x4' tray, with a square light footprint. And hopefully get an added bonus from the LEDs.