I bought this bulb to replace another except to use less electricity, be a bit brighter, and not require disassembly of the fixture to remove the ballast. It does check those boxes but is a bit longer than the bulb it replaced. I had to bend the inside of the fixture to allow the new bulb to fit. I guess all's well that ends well, but it would have been better if the bulb was the same size as the original one.
Rating: [4 of 5 Stars!]