I can get sockets at lowes for $0.97 each, and 25' of wire for $9.99. A 12 light rack can be made for less than $60. No need for extra fans, these things don't run that warm. I've now got 24 lights in a 65cu.ft. room and the temp stays at 75. Some of my lights are the 42 watt, all at 2700k spectrum. My exhaust is 70cfm, so nothing extreme is needed to keep things cool. My grow is doing excellent. Granted, maybe not as good as if I had used mh or hps. I understand that much. My insane-o cfl array will be tested with a scrog immediately after my harvest. Penetration will not be a big issue and I'm sure to have corner to corner coverage and sufficient lumens.