I'm headed off to work ,but I'll give ya a quick rundown of my question. I just recently went from "box growing" to actually commandeering a closet for this purpose. It is about 5' by 8' or so (walk-in closet). As soon as you walk in and turn to the left (along one of the 8' sections of wall) there are two shelves running the length of the 8' section. one shelf is about a foot and a half from the ceiling..the other is about 3 (or so) feet below the top one. Now on this bootom shelf I am curently germinating 4 plants. I have a pretty nice setup for germinating with the flouros that are in there ( two four-foot flouros on a horizontal and 2 two foot flouros hung vertically). So far my plantys are indeed "growing like weeds". However I would like to use the back portion of the closet for flowering (A space of about 3' long by 4' wide by about 4-6ft tall or slightly over one square meter of space for you metric folk ). I have cats so I usually need to keep the door closed so they don't eat the plants and with the 4 flouros I have in there now, the room gets pretty warm. I wouldn't say "hot", but definitely quite warm. I am looking to get an HPS for flowering to put in the designated space mentioned above. I only plan to have no more than six plants at any given time in the aforementioned flowering space in the back. My question is what size HPS would be adequate for the small space and as I've heard these things get quite hot, this worries me as I've said, the flouros create a nice bit o heat themselves? And also, does anyone have any idea how I could ventilate the room while keeping my cats out (drilling through the wall is not an option as I live in an apartment complex and the landlady is a real beasty in her best mood ) )? Any Ideas will be gladly recieved. PS- I will post pictures of the areas I am speaking of very soon (as I need to get the cord for my digital camera back from someone) so you can better visualize the area. I may also post pics when I get home from work..gotta run! Thanks to all who reply.