Setting up 8' long room, 6'w 5.5'h

[killerweed420]

2 and a 1/4 feet is kind of small to have 4 plants unless you're growing them short. I have an 8 foot room and place 15 plants in the center with a 1000w hps with a 4 foot parapbolic reflector and thats pretty tight. I would probably go with 2 rows of plants per side.