Thanx for the info jamstigator,

Im thinking of useing a whole bedroom for this planned setup as im not sure what size the attic will be so there might not be as much head room there as needed after hanging the lights ect. Although this is my first grow i was thinking about going all out and constructing my own fill and drain hydro set from inexpensive parts, I mean there not that complicated when you think about them and after water cooling my home PC it carnt be much harder than that, the only problem with this setup is that i will have to raise the plants and im not sure how hight the sealing will be in my designated room.

i was thinking of buying a small clone hatchery that can hold around 10-20 plants or something and have that with a mother plant in a clock room or small cupbard, clone in that then transport the clones to the hydro set, veg and bloom them all together in the same room just change the bulbs depending on what stage there in i have around £1500 to spend on everything from ventilation/nutrients/parts/lights ect and want to end up with about 1.5-2kg. Every crop e.g. 3-4 months

The only reason why i wanted to use envirolites is because of the electric bill. I already run allot of electricles in my flat now and will be moving to a house where ill have even more consumerables, i rougthly spend in this flat around £20 every 3 weeks on electricity and thats for just playing my computers and having a server class pc running 24/7 helping the sharing comunity . How many plants could i get under one 600watt HPS?. Thank you.