Andrew Gabriel wrote:

[...] That pretty much kills LED lighting in the retrofit replacement
lamp marketplace. Once you go up to larger light sources which stand
some chance of dissipating the heat and remaining cooler, you're in
the territory of fluorescent tubes, and LEDs can't compete there.

I think they'll retain the niche they now have, but unless there's
a breakthrough [...]

Some people seem to think that's coming soon:
http://www.rsd.cam.ac.uk/events/hori..._Humphreys.pdf

--
Andy