In all likelihood, you’ve heard that compact fluorescent lightbulbs (cfl) are among the most energy efficient, long lasting lighting sources currently available. They last 10-15 times longer than a standard incandescent bulb and use 75% less energy. CFL’s are considered one of the most inexpensive steps people can take towards a greener, more energy efficient home.

But by the same token, you’ve probably heard that cfl’s give off a cold, unflattering light. This was true a few years ago but not anymore. Lighting companies have developed cfl’s that produce a range of light qualities depending on your needs.

When purchasing a cfl, take a look at the Kelvin rating on the package. The Kelvin is a measure of the light’s color temperature. For example, a standard incandescent light bulb is rated 2700 K. If you want a cfl that gives off a warmer light similar to an incandescent, choose one marked 2700-3000K. If you want a whiter light, choose a cfl that’s rated 3500-4100 K. For a bright white light that’s similar to daylight, choose one that’s 5000-6500K.