The compact fluorescent lamps (CFL) are more energy efficient than incandescent and halogen light bulbs – so they cost less to run.
For example, if you replace just one halogen lamp with a CFL, you could save an average of $5.62 per year. Replace a whole household worth of halogens with CFLs (37 on average ) and you could save $208… each year!
CFLs are quite popular in homes as they have the convenience of being direct replacements for many traditional and halogen incandescent bulbs – as are more efficient LED lights. Fluorescent tubes have a different fitting (the ballast) and are often used in garages, offices and other workspaces.
While not quite as efficient as LED lights, fluorescent lights are still a very energy efficient lighting technology. The way fluorescent lights work allows them to generate a lot of light yet not much heat. Any electricity that goes to generating heat – instead of light – is wasted, so generating so little heat makes fluoros an energy efficient choice. In fact, they are so efficient they are almost as cheap to run as an LED – though unfortunately last about half as long.