I installed them with a dimmer according to the connection diagram which was promptly emailed to me by product support at my request. The light flickers at almost all dimmer settings except full power. They are useless at any setting near dimming. I emailed support again about this issue and they replied "I wouldn't use a dimmer with this light". This is after they advertised "dimmable" and even sent me a diagram of how to dim them. This is so ridiculous it's funny. :) I'm sending them back.