Compact fluorescent is a generic term used for a variety of bulbs. CFL's use less 20-40% energy to produce more light per watt and are color adjusted to produce light close to real sunlight.
CFL's generate less heat and offer a longer life than incandescent bulbs, saving you money on electric bills and protecting the environment from harmful greenhouse gas emissions. Look for Energy Star labels on fluorescent fixtures and lamps for assurance of maximum savings, quality and standards.