A few months ago I started looking into using CFL (compact fluorescent) bulbs for our apartment. They cost significantly more than a standard incandescent bulb, but they last several years and use a lot less power so they quickly pay for themselves through energy cost savings. I decided to replace all of the light bulbs in our apartment with CFLs. Now there is something even better out there.
By bunching together groups of LEDs, manufacturers are creating new bulbs that use even less energy for the amount of light they put out. A flashlight that lasts for several years? I might have to look into that. Still, at current prices I’ll be waiting a while before getting rid of our CFLs for LEDs.