I have the 2ft Version 4 bulbs 2000 lummes each in the top of my cab. So far for growing it works really well. I believe the reflector has alot to do with it as well. I remember reading about it on the net. SunSystem T5 2fter German technology reflector.

I plan to add some cheep side lighting to the cabinet in top compartment and flower with this light. I will post the results.

Regardless tubes are simple for me no heat in a small space.

kd_special