Hey,, just on your cfl front,,, how many lumens dose it all add up too? I find going off lumens means you either add lights or not. I work off 10,000 lumens a plant. I have one cfl,250 watt plug and grow. has a reflector, and is about 19,500 lumens , of course it will go down over the 8,000hr life.
So if you want to add more lights what sort of heat, air vents and that do you have??
I dont know if you will be able to but cfls hung vetically arent as effective as horizontally, thats from my grow bible,, but for the size of your lights I dont know If you could change the setup. That will increase how many lumens are gettin to the plant. If you see what I mean,, from your second light pic, all the light coming from the hanging bulbs is directed toward the walls, light dosnt travel down, it travels straight out the side of the bulbs,,,, and very little light is direct light, its just that small u shapped bit on the bottom giving light,,it should be the long side of the buld..so your not getting all the lumens you can, cause reflected light looses lumens.
Im not saying your setups wrong,, not at all,,looks good, but thats how the cfl bulb works.
On your topping question,, you should wait till a week or ten days before you flower them. That when I topped one ,,o its the top two branchs to cut ,or top off,,so go to the top of the plant,come down past the first sprouting leafs,passed the ones that are half open(2nd leaf set),,if you see what I mean then chop it off right between the two branchs so the stem with branchs at the top are a T shape,, sorry, my description is poor,,I did oneof mine and she has turned four branchs into tops,,compared to my other plant that looks like a normal plant..
Hope that helps ,,
Take it easy,,..
