I personally have just switched to using LEDs. I purchased one to see how it would work based on the recommendation of a friend and have been very pleased with it so far! I have five plants flowering under this
90W LED Light by eLoofa. It has a little fan on it and barely produces any heat.
I had five small plants that were flowering and I switched to the eLoofa panel. I felt it wasn't enough coverage so I actually decided to supplement the plants with two 100W CFL lights from the sides. The amazing thing is the plant still totally leans towards the LED light in comparison to the CFLs, which seems to indicate to me that it's working. They're started to produce fat buds, and there's still another month of flowering left. It's worked well enough that I just bought another. I live in a hot area so heat can really be an issue and I'm a small-scale grower and just want a personal stash. I don't want to have to deal with venting and ducting so the LED panels are great because they don't produce any heat. I'm going to be starting another grow soon using just an LED panel from seedling to harvest so I guess that will be the real test to see if it works.