I've grown dissatisfied with the light over the mirror in the master bathroom, as it uses 2 150W halogen bulbs (well, it's supposed to use 3, but I broke one taking it one out years ago). It's very, very bright and hot, and it hurts my eyes, and I don't like the fact that it uses more power than my office.
Well, I've just installed 2 6W LED arrays. They're (understandably) not as bright as the halogen bulbs, but they're very white. We'll see how we like them - there's a chance I could end up getting another one for the middle bulb holder if we want a bit more light.