In article ,
"DanG" wrote:

If you are not going to insulate the ceiling, and even if you are,
yours looks like a natural for T8 fluorescent lighting with
electronic ballasts. I would think you don't have the ceiling
height for high pressure sodium or metal halides, to say nothing
of the expensive bulbs.

That ceiling is under the second floor (went with 20 inch TJIs so that
the second floor can actually hold some stuff - 56lbs/sq ft.,
clearspan), so no extensive insulation plans. The attic gets a lot of
insulation (and the walls are R-34 stress-skin panels).

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