I got these to replace some spot bulbs I got here a year ago. The old ones were OK, but not quite as bright as I wanted, and too narrow a spot. These claimed to be twice as bright and not as narrow a focus. Well, they were not even as bright as the old ones, and more of a flood than a spot, so I stuck with the old ones. These are definitely closer to 350- 400 lumens than to 500.