Hey easthead. I'm currently flowering in my drobe using a 125 red Envro and 2 regular 20w cfl's (energy savers). The 125w hanging from the roof and the 20w's fixed to a board positioned in the centre about an inch above pots. I reckon all together this gives me 11 - 13k lumen [10k(ish) from the 125w and 1k each for the 20w's]. Im not sure what spectrum the 20w's add, but they seem to like it. At first I wondered, even worried if i'd get a decent harvest, but 26 days in and things are looking execellent, loads of big hairy clusters coming from all the growing tips.
The great HPS vs Envro debate will always roll on. Its my first grow so I cant pass judgement yet, though I suspect the yeild would be much increased using a HPS. But in the confined quaters of my drobe the Envro's are performing well and im not disapointed at all. There easy to use and I can leave them without fear of burn out, and the envroment is easy to maintian. I could even increase to 200w cfl bulb now but things are just fine the way they are. Im expecting a couple 0z's of 4 plants...
Next time round I'll stick a 250w sodium & cool tube in there, set up SCrog and go for 500+ grams from 1 or 2 plants. Envro's are good though, I cant fault them atall for my first attempt and making some budZ...