For two reasons:
1. It was off-topic; it had nothing to do with desktop publishing.
2. When I clicked on your link McAfee Siteadvisor jumped in and warned me that the site will do unauthorized things with my PC. Don't post on such dangerous sites!
Light bulbs you shouldn't buy
There are plenty of dimmable LED light bulbs, but make sure you don't buy the ones that flicker when you dial them down.