Fifteen years ago we began to see Compact Fluorescent Lights (CFL's) for sale. They provided the same amount of light (lumens) as conventional incandescent lamps while using 70% less energy and lasted so much longer. I bought a bunch, installed them and was quite satisfied with them. The CFL's (mini-spiral) lamps do have some drawbacks, they contain minuscule amounts of toxic mercury, take time to warm up outside in the cold, and a lot of people are turned off by the mini-spiral shape. Now it's Light Emitting Diodes (LED's) to the rescue! They started appearing a few years ago but were so expensive that I wouldn't consider buying them. LED's are instant on, have no mercury, and use up to 80% less energy than conventional incandescent lamps. The only drawback I could see was the high price. Last week our Walmart had 60W equivalent (800 lumen) LED's on sale for $1.50 each so my son bought me 6 and I installed 5 in our in-suite bathroom. They are 5000K bulbs that are daylight color rather than soft-white. A bit harsh on skin-tones but much easier for old eyes in the bathroom mirror. I'm going to buy more this afternoon because I suspect that's an introductory sale price that won't last long.