I've got just around 16" from light to top buds, and from what i saw, 16"-18" seems like a safe distance as long as i can cool the room abit. Gonna leave her at 200 for now and raise to 300 watts next week and by the start of October since electric will be cheaper and the weather in the 50s and 60s here, I'll turn her all the way up to 425 for the last 4-6 weeks since the buds gain yhe most weight in the last 2 weeks anyways. Next time i grow this big a plant, I'll just do better lst with the topped branches to keep them in check.
@Frank Nitty 28 days. Topped day 18 just above 5th node. Cut lowest as it was too weak to ever reach the top. I also cut the 1st set of branches from the "new" 1st and 2nd nodes to keep some space inside and get a good start on cleaning up the bottom of the plant. My Timber cob(420 watts) is at about 200 watts right now and for nutrients, she gets GH Flora Nova Bloom and nothing else. Been growing in 100% perlite for a bit instead of coco, so not even feeding cal mag. Anywhere from 4 to 6 ml per gal as i don't even measure anymore. Just shake and pour. Can't argue with pics, and if it ain't broke, don't fix it. Happy growing.
got some ugly and droopy leaves farther up. Fed her just before taking the pic, so hopefully she'll look happier. 8 weeks from sprout today and 3 weeks since she started to flower +- a day. No real smells yet, and glad she finally stopped growing to the lights. Was able to raise my lights 6" or so, cause the light was only about 8" from the tops. Really liking how she's turning out.