RE All the "efficiency" talk here, in all the LED articles:
1. Energy efficiency is just one type.
There is also the small matter of constructional and performance efficiency
It is much simpler, and cheaper to construct a bright incandescent than a bright LED bulb
- in fact omnidirectional 100W equivalent bright LED replacements for ordinary bulbs can't be bought regardless of price.
2. All lighting types have advantages - energy saving is only one.
The overall switchover energy savings are small anyway, referenced
http://ceolas.net/#li171x3. LEDs have several issues of their own
They are in effect pure light sources in spectrum output, somewhat like lasers,
sometimes as with phosphorescent coating (as with white LEDs) to spread the light, but then mimicking CFL light quality.
They so not have the same smooth spectrum as incandescents, even with filters,
and their CRI is nearly always lower, and often ???tweaked???, so photographers and filmmakers are unhappy about rendition too.
http://ceolas.net/#li15ledax .
