Quote Originally Posted by Sprite
Sweet! Do you know if it would work in a SunSystem lamp? Are brands interchangeable with this stuff?
I'd again say YES! HPS and MH and wattage must match the ballast regardless of brand. Sounds like you'll be OK.

Quote Originally Posted by Sprite
Also, do you think a 400 HPS with some florescent supplementation would see me through veg and flower, or would I really need a MH to veg? My research shows conflicting info... :wtf:
It's ideal to veg with MH and flower with HPS. I've read it done successfully with either all the way through.

If I had to "make my best guess" I'd say you could very well veg 18 hours a day (some say 24 hrs) with the 250 HPS and some CFL's. That should give you time to order some bulbs from 1000bulbs.com. When the plants start to get big change to 400 HPS and your CFL fluro's. When they are ready (alternating nodes and/or showing sex) I'd use only the 400 HPS 12 hours a day. (some say 13 hrs) Your lighting schedule and nutes type will still make the change from veg to flower.

GodSpeed!