Dude I have 12 grow bars which I was using 4 for veg. Most of mine stretched and were growing super slow. So I decided to change to daylight cfl's for veg and am going to put all 12 led grow bars in the flower chamber. I am hoping the overly red spectrum they put out will work out perfect for flowering. If not then the next grow will get an hps. I got a room air conditioner so heat is no longer an issue. However I have all these bars so I will give it a shot. Just trying to fine tune my grow setup ya know.