> http://www.omafra.gov.on.ca/english/livestock/dairy/facts/info_nutsbolts.htm
>
> Incandescent        15- 20
> Halogen              18 - 25
> Fluorescent         80 - 100
> CFL                     50 - 80
> Mercury vapour   40 - 50
> Metal Halide         80 - 90
> High Pressure Sodium 90 - 110

Did I forward to the list the article about the fellows making light pipes
to redirect the output of metal halides?

The beauty part there is that in addition to high output per watt, by
using a passive element to redirect the light where it is needed, the
bulb itself can be outside of the environment to be lighted.  This pays
off big time for supermarkets who no longer need to fight the heat
generated by incandescent bulbs in those sixty-foot freezer cabinets.

Mike H.
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