what are cfl advantages?
The most commonly used energy-saving light bulb is the compact fluorescent light (CFL). Light-emitting diodes (LEDs) are increasing in popularity, but their high costs are often prohibitive for the average household. CFLs offer substantial energy savings to their users. But they have their drawbacks, too --- for example, some question the safety of CFLs due to the their potentially toxic contents.
On average they cost in-between $3 and $4 per bulb. Each CFL bulb can reduce your homes greenhouse gas emissions by several hundred pounds over the course of its lifetime. While they are slight more expensive than incandescent bulbs, they are often considerably cheaper than light emitting diode fixtures.