thanks man I keep the light about 12-18 inches but I adjust to keep the temp with in tolorerance and that depends on my ac for the house and the temp outside but usually about 12-18 in. I'm going to order a air cooled 600 watt light soon though and hopefully a bigger tent so I do 2 plants at a time but start them in like 2 gallon pots and transplant into rubbermaids and really grow some bushes, I like veggin as much as blooming, this time around though is all new to me and I'm excited for the bloom stage as well, I like to look forward a couple weeks and imagine what they will look like