I purchased these to replace the 50W halogen bulbs in our master bath light fixture, which is a very modern fixture and didn't need to be replaced other than the overly hot halogen bulbs. The bright color matches with the cool gray tones of our updated bathroom, and they give off plenty of light without the associated heat of the old halogen bulbs. I can't comment on the longevity as they have only been in place for about a month, but I do expect them to last. Since they are dimmable, the next sSee full review