The Old House Journal has a terrific article at oldhouseweb.com/blog/how-to-find-energy-efficient-bulbs-that-dont-suck-nutrition-facts-for-light-bulbs.
Starting in January 2011 light bulbs are required to be labeled with lumens, watts, kelvins and efficacy. Greek to you too? Not worry. The label is now clear, easy to understand and full of fun colors.
It’s good news to me. Here in New York State, we will be forced to use only CFLs (or LEDs) for lighting. I have discovered that not all CFLs are created equal, and have often wondered why the differences seems so enigmatic. I had no idea about kelvins and lumens and all that jazz. I recently purchased some “full spectrum” bulbs for our desk lamps, in the hopes that these bulbs would give us a little energy perk and cheer up our spirits on the gloomy days that New York often suffers. I’d heard that full spectrum bulbs simulate sunlight and therefore help improve mood and make you faster than a speeding bullet and etc. Honestly, I don’t rely on light bulbs to cure diseases! But if full spectrum bulbs give us a little psychological boost, then, hey- why not? Honestly, I can’t say I have noticed a huge difference. Maybe. I’m a pretty chipper person, anyway, especially when I’m at my desk. 😀
Anyway, now we have a little guide for choosing CFLs. I like it. Here’s what Old House Journal said:
1. Bedroom and Living Room: Pick a bulb in the “yellow” range as close to 2700K as you can get.
2. Garage, Basement, Laundry and Utility Room: These are rooms where mimicking the sun is okay. So, look for bulbs in the “white” range and have a high color temperature of about 5800K. Don’t go too much higher than that or you’ll end up in the ugly “blue” range.
3. Computer Screen: There is a great free program I use called F.lux. It makes the color of your computer’s display adapt to the time of day, warm at night and like sunlight during the day.
For more specific information, see the lightingfacts.com/Downloads/Performance_Scale.pdf U.S. Department of Energy’s CFL lighting facts chart (opens as a pdf document).