Last year, we bought a bunch of the DuraBright energy saving mini-spiral light bulbs at our local home improvement center on sale: 14W, 20W and 23W. We replaced as many lights as we could. Unfortunately, a number of our fixtures are on dimmer switches, so we were unable to replace all our conventional bulbs. The 23W gives off a warm white light, which I prefer. It gives 100W light output, last 13X longer than a conventional bulb and comes with a 9 year warranty. The only other downside to mention is that it contains mercury.