By the way,,you can put those T5s right on top of your canopy. I kept mine 2" from top with no problems. Hell,,with 6500Ks the leaves can touch the lights and not burn. Different story with the 2700Ks if ya wanna Flower with them,,they get much warmer anmd can burn leaves. My very 1st grow I went all the way with T5s cause its all I had at the time. I had a 4ft 6 tube HOT5 fixture and my buds turned out nice,,,but HPS is much better for flowering if ya have one. Check out the T5 grow below.
http://www.marijuanapassion.com/forum/showpost.php?p=819918&postcount=19
http://www.marijuanapassion.com/forum/showpost.php?p=819918&postcount=19