If it was me I would just LST one plant... but hey, I'm no expert. LST is really fun and gives you something to do with your plant instead of just staring at it while chanting grow, grow grow...and requires no screen to deal with so it gives you better access. Many would also say that it is better because not topping the plants prevents you from having to wait for the plant to 'rebound' from the cut.

Do a search on LST and you'll see what I mean.

For lighting in such a small space I would just add a couple of 23 watt CFL's to the floros and get rid of the reading lamp.

Also, if this really is your first grow you need to do some serious reading on nutrients, soil and PH, or hydro of course if you are going that route. PH can be real nasty thing to control so I recommend getting an electronic tester on Ebay. I wish I would have done that from day one... would have saved a month of agony and almost killed my plants.
If you are considering a super simple hydro setup do a search for 'hempy bucket', it's the simplest way I know of. I will be using it for my next grow.

Lastly, I'm just a beginner myself, and only grow very small for my own medicinal use, so don't take my words as gospel, just keep searching and reading on this site and you'll get the idea. I'm just trying to help others that may know less than me and take the load of the experts who are probably tired of responding to us beginners rudimentary questions.