Some weeks back there was a discussion here about the technology of
high-efficacy incandescent lamps. I've looked at the (very few) research
papers on the subject and it appears that any such lamps would have to be
built with multiple technologies such as halogen, infrared reflecting films
and highly-processed filament materials. That sounds expensive and
difficult plus the benefits would be relatively small -- perhaps getting the
lamps into the 30-40 lpw range compared to CFLs at 80 lpw and
commercially-available white-light LEDs now about 40 lpw and rising.

So, it wasn't surprising that GE recently announed that it was not going to
pursue new incandescent lamp technology. Will anyone else do you suppose?

Terry McGowan