When I realized my flickering dimmer switch only supported 150W for a light fixture that needs 200W support, I decided to give this one a try. I don't know if there's another issue with my light, but this dimmer switch only made the flicker a bit better. Another reviewer said it made her lights stop flickering, but unfortunately it only made mine flicker less frequently and lighter. That said, it was a straightforward installation and the dimmer function does work, so this switch will probably work for light fixtures that have less than 5 bulbs or between 150W and 200W.