Hey Kali

I only started using CO2 yesterday, I was waiting for the parts to arrive. You can see my DIY CO2 and DIY reflectors for CFL in the DIY section.
The only other part I will need is a bubbler for the CO2. A bubbler creates an air lock so oxygen can't mix with the atmosphere in the Milk carton.
I'm using Turbo Yeast which is said to produce more CO2 than regular yeast at room temperature.
Even when I close the valve and shake the milk carton I can see the milk carton fill with CO2, I have to open the valve in seconds or the carton will explode.

On the subject of LED lighting, I use the Pro-Grow 260. It's a great light and you can check it out on hydroponics Hut dot com. It's really a great work horse.
It draws about 190w, even though it has the '260' in its name. I used this LED primarily in my first grow log (in my signature) with just 80w of CFL for heat purposes.
This grow I added 260w of 2700k CFL (4x65w) but only during bloom to give the plants that extra kick. And holy crap that's exactly what they got ! CFL and LED are a great combo...

My grow space is 90cm x 90cm and the Pro-Grow 260 is just right. It's advertised for 5 plants, I have 4 in my tent. The guy who makes these advertises realistically, which is more than I can say for most of the other LED manufacturers... They offer free postage to Europe from the U.S. and I think a 3 year warranty ! I sometimes chat with the guy by email, a really nice fella and is always there to answer my questions... I don't think I would ever shop anywhere else. Check out the new X5 LED from them, it's a new model and I would kill for one of them !

When I move apartment sometime and I get a bigger tent I'll get one for sure. I'll keep the Pro-Grow 260 for vegging, I'm never gonna give that light up

So glad you are enjoying the grow, stay tuned for more weekly updates. Let me know if you get in contact with Hydroponics Hut, ask for Benjamin and tell him the Irish LED Logger sent you

Take Care buddy

S.L.