You can get some of these FREE if you participate in our beta test program. These are low UVB lights, designed to run 12 hours a day on your plants. They are T5 style (5/8ths of an inch in diameter) and F54 standard, meaning they need a 50-54 watt ballast. They will fit into any standard F54 rig, which is just short of 4 foot long. You need to call us if you want to be a part of the beta testing team, 1-800-600-8118 x126, and talk to me personally (Dennis) for information. Those that don’t want to be part of the official beta but want to try them out can also call to get them cheap, and just provide some basic info. I only have a limited number of test lamps, so call now to get in on the deal.