Yes, this bulb is dimmable. We recommend Lutron dimmers for these like, MAELV-600, DVELV-300P, DVCL-153P, MACL-153M, PD-6WCL, RHCL453P or the Leviton SureSlide 6674. I hope that helps.
@lynn kris When used indoors these are not to be enclosed. But if used outdoors, please make sure they are protected from direct contact with weather.