unlike another grower, I put the t-5 54W inches from the tops of the plants right from the get go. Maybe that I have a four lamp fixture and his was an eight lamper may be all teh difference. dunno. But, the T-5 54W really can grow pot and produce decent bud. Not as good as HPS, but you don't have4 to fuss with ventilation and temerature nearly as much.

Sho