This year I insulated walls and ceiling and covered everything with
1/4" plywood painted white over light gray. The white ceilings and
walls have tripled the amount of light in the shop. the only drawback
is that you can see the accumulated dirt and dust much clearer now
I don't have it at work today, but there is a large reference tome
used by architects that talks about *everything* involved in building
structures. Expensive, but wonderful. The chapter on lighting includes
some charts that give an idea about the relative brightness of
various paint schemes. If a room with four white walls, white floor and
white ceiling is 100, a dark ceiling (only) drops it to about
58, a dark floor (only) drops it to about 85, dark walls and dark
ceiling (such as one would find in an unfinished garage) is
down to about 38...
Paint those walls white, even if you're just painting the studs and
sheet!
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