-- pelirojaroja said:

But the heat output and cost factor could be prohibitive. MH lights
get HOT and make the meter spin like crazy.

On a lumens per watt basis, metal halides win over flourescents. That's why I'm
seeing them more and more often in commercial buildings. The only lights that
beat them for efficiency are the high pressure sodium lights (the ones that look
very orange); metal halides have a more natural-looking spectrum so win out
over sodium for indoor lighting.


--
Pat in Plymouth MI

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)