They seem to be good lightbulbs but I really haven't had a chance to try them. They are at least a few millimeters longer than MR16 halogen bulbs and don't fit in my fixtures (I have adjustable angle ones with a cap that covers the back of the bulb when it rotates). LED bulb manufacturers seem to be able to afford large sizes, and they last significantly longer than replacement halogen bulbs. I have replaced all my light bulbs at home with LEDs and have noticed this in many of them. Sometimes they are shorter than the corresponding halogen, sometimes longer. The shorter the better as they match the fixture but are set back slightly. One would hope that the lamp's naming would mean that it was size compatible to fit in the fixture, but that doesn't seem to be the case. I cannot rate their quality and performance as I have never tried them. return them. They just didn't fit.
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