These Feits are not really compatible with my fixtures, designed to use halogen MR16s. They flicker at high as well as low settings. I have purchase new generation Ushio brand and GE brand warm spectrum LED MR16 bulbs, which give off a warm light that is particularly flattering to reds and do not flicker even at low dimmer settings. I had hoped the Feit would be new generation too, but they are not.