They are not available yet though the industry is working on it.
With that, rather than watts you really should look at the:
- warmth/coolness of the light,
- how many lumens it produces, and
- how it throws (distributes) the light.
I think you might be surprised at the results.
When you tie all the parts together you may find that the light given off by a LED is more than adequate and easier on the eyes.