Not only do Sylvania and TCP lamps last longer than knock-off, or commodity brands, but because they are held to higher quality manufacturing standards, they deliver a more consistent light temperature (color) throughout the product line.

TCP lamps are marketed mainly to commercial applications, and so you know you will be getting a quality product when you buy TCP CFLs (Compact Fluorescent Lamps).

As you probably know, CFLs save you money by lasting hundreds of time longer than old incandescent lighting, but not all CFLs are created the same. While CFLs may be rated to last up say 20,000 hours for example, the lower-end manufacturers will burn out long before. This is why you want to invest in the quality of brands like Sylvania and TCP.