Coolltube--> yes very nice, looked at those and am kindof looking for a suitable glass.

Growing at night --> Yes true, already doing that. Lights on at 18:00 and off at 12:00. When I start flowering I'm going to do 18:00-6:00. Tempted to do 21:00-9 but that leaves little time during weekday evenings to work in it.
HeartCore Reviewed by HeartCore on . Ballast question Hi all I got a 400W MH lamp with a ballast. Also have a 600W HPS for flowering, also with a ballast. Problem is, I'm vegging with the 400W but the weather is just too hot. I can manage temps with difficulty. If the weather doesnt change soon, I will have major problems with flowering once I switch to 600HPS. What I want to do is to get a 400W HPS bulb for flowering, I'll use the 600W exclusively in winter. Question is, can a 400W HPS bulb be safely connected to the ballast of a 400W Rating: 5