I am very impressed with the service I received, and the quality of the bulbs I bought, which arrived quickly. They are 15W LED's and directly replace my old 100W bulbs, so they are already saving me 85℅ on running costs! They have a very long life, too - much better even than modern 25W compact fluorescent bulbs - and will last many times longer than my old style 100W bulbs! They have a nice even spread of light, and are very bright. I chose the cool white version, as these are for my workspace, but they also do a warm white option. They are available with either screw fittings, or bayonet caps. Whether you are currently using old syle incandescent light bulbs, or compact fluoresents, replacing them with these new LED's is a no-brainer! They were very competitively priced, too. I will certainly be buying from this company again.