CFL’s are a lot like the high output florescent, but work best in small spaces as they do not produce much heat or use much electricity. For fruiting or flowering plants, the 2700K warm bulbs are best. For plants taller than a foot, regular fluorescent tubes can be supplemented on the sides of the plants to increase light intensity.
When using CFL’s, you should remember to use the actual wattage (NOT their wattage equivalents) when calculating how many watts you need for your plants. Listed below are some CFL lights and kits to get you started.