glad you went to a hid but i will say if you run 250w in CFL the yeilds will be the same....i always get more than a g per watt when running CFL i cant say the same for when i run my HPS.....i got 3/4 a lb with 350w(14- 23w/27w) of CFLs last run and only 9 oz running my 600 hps! i still need to get my number of plants down but i think i can get over 1.5 lbs from my 600 with over 50 plants but the number of plants scares me!