I bought this as a spare for one I bought in a Home Depot store in 2007, which is still going strong. The new one appears to be almost identical - it has 3 u-bent tubes rather than the typical spiral inside. It gets to full brightness quickly and dims to about 50% on a cheap dimmer; it does hum when dimmed, but so do incandescents. It may perform better with a good-quality dimmer. Color is a bit on the yellow-green side, but I actually like the way it looks.