I think im gonna wait till i get my HPS....I'm gonna go with the 150...Just because i really can move alot of air around in there...The closets size is about 6x3x4 but i'm only using 4x3....It has two sliding doors that fold....I read that i could have a good grow with 4-5 plants....I'm thinking now with the seeds i'm growing i'm hopeing to get atleast 3 girls...So i will see how this grow goes and when i order seeds i can have a better thought as to what i'm gonna buy....Thinking a autoflower...A kush auto flower...They look awsome!!!