is my grow space too small?

I have a 1.5 x 3.5 closet to grow in it has an 8 foot ceiling. I am going to use 600 watt mh to veg and 600 watt hps to flower. Is tis a big enough area for 6 plants? I have made a bubbler identical to the SH bubbleponics system. inside this room is the return vent for my air conditioner and I was thinking about ventilating into there. please give me your thoughts and re-pore

Some pics would help, but I have a similar setup. I dont have 8 ft of vertical space though, so that should be plenty for veg. and flower. They are going to grow very fast under the 600, so if space becomes a problem look into some LST techniques. I think you should be ok though.

Well thats not much space for how wide they will get under a 600wMH. I say 3 medium plants (2-3 weeks veg) or 2 Big (4-5 weeks veg) <------- I know you wanted six but that 600w will make some bigg ass plants, You have all the height you need. Running a 600w MH in an area that small might heat it up. do you have any ventilation plans?, if not remeber leave the door open alot

Nice hight in your grow room bud, just a shame about that depth 1.5, like the dude above says, three will do well, maybe bush them out a little, i say grow less plants, well at least until the law changed "wave" post some pics here so's we can see how you do peeps

3 Plants, LST, and vent to that return. If their not already white, I'd re-paint the closet walls to a flat-white as well.

You'll also need to find a way to bring fresh air into the closet. I have a bit bigger and temps were in the mid 80's with just a 150w HPS and 150w of cfl's.

Test the room out with the lights running BEFORE you put plants in it. If you can't maintain 75-85 F with the lights on then you'll know.