Hey,
I was just looking at your grow on the Irish Tokers page.
You are using CFL I see.

Just a small point on CFL. I have a light metre at home and I have a few CFLs in my grow too. It is shocking how much light is lost once you move an inch or 2 from the bulb.
If you want to make the most of the CFL I think it would be better to keep them much closer to the plants. Also, as the lights are hanging on 4 points around the plant a lot of light is being lost in the other direction. Perhaps you could make 4 small reflectors that can be attached to the lamp holder. Bending wire and attaching a white, reflector, 60 degree bent in the middle, behind the lamp might work wonders for the plant.

I really think that you need those bulbs as close as possible. Just an idea.

Take care.