Just replaced a 50w halogen pin light with a 2W yellow LED..
it's a big help since the painting the halogen pin light was pointed at doesn't feel hot anymore and I use it as an accent/ambient night light...you won't feel guilty waking up late with a 2w light turned on a few hours more than a 50w one
Oh and there are quite a large number of dimmable LEDs available now compared to a year ago. It's good that this is catching on.
Planning to use LED strips on the garage for use when Im working on cars at night.