Im gonna start this today. i have 2 400W lamps, 2 hps, i just flipped the plants today after failing to make clones from what i trimmed off. it sucked. but thats off topic. i have a nice fan and get about a 64 degree room. its gonna be fun. im really excited and keep adding stuff to make the set up better. i use a combination of nutrients i dont want to reveal quite yet. i cant wait to see my plants flower!!!!!

64°F is awfully low for lights on, try and get that temperature up to 76-78°F

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i was going to say something about temps too..
you need to raise them at least ten degrees..
got any pics..?

And make sure the light is about 18 inches above the plant. See, no one ever told me to do that, I had it up about 7 feet high. So the door could pass under it. And I didn't get good growth. So, do that. I'm telling you, it's better.