I've lost track of the amount of time I've spent researching LED lighting design. I feel like I could give a course on it now. Long story short: after some bad mixes of bulbs and electronic drivers, I decided to try this "old school"-style magnetic driver. It works perfectly... dims to a reasonably low level, no flicker, and enough power for brighter bulbs. Very happy. Only reason I dropped a star is that the unit does get hot, but that's not necessarily a product issue, i guess it's just how these magnetic types are.