In article , says...

Concerned that I was getting lazy, I went out and measured my ceiling
joists and other structure carefully and spent my evening with SketchUp!

I am concerned as to how many new 48" (10" wraparound) fixtures to add.
Please see my two jpeg's:

http://web.newsguy.com/MySite/

Putting another light above my virtual bench may make good sense.
However, If I regard my bench area as 10' by 8', then my new pics at my
web site already demonstrate 80 ft^2/6 bulbs = 13.3 ft^2 per bulb!
Don't want to blast my self out. I was thinking of using 32W, 5000K or
6000K fluorescent bulbs.

I would like to try to optimize my lighting? As drawn, the distances of
the lights from the walls are 36" and 24" respectively. Assume the
walls will be white (for decent reflectivity). The floor is concrete.
I'm going to keep the light in front of the subpanel 36" away from it to
satisfy relevant codes (regarding a "free workspace").

There should be a light positioned to illuminate the guts of the panel--
for some reason I was under the impression that there was a code
requirement for that but it might be my mind playing tricks on me.

The "free workspace" requirement doesn't mean there can't be anything in
the ceiling--the idea is that there has to be room for a guy working on
the panel to stand in front of it and work on it without being in an
awkward posture.

I never did this before and I hope to do it right the first time. What
would you change?

Just a suggestion but check your local library and see if they have or
can get for you either the "IES Lighting Handbook" or "Time Saver
Standards for Architectural Design", or check the used book sites and
see if you can find older copies for cheap.

"Time Saver Standards for Architectural Design" has a good section on
lighting design, with illumination patterns for many common types of
fixture, the required illumination levels for a wide range of tasks, and
details of calculation methods. The IES Handbook has that and a
tremendous lot more--it's the "bible" of the lighting industry.

If you're dealing with straight tube fluorescents then any edition of
either published in the last 30 years or so should have what you need.

If I have time over the weekend and can find my copy of Time Saver
Standards I'll see if I can work out the numbers for you, but no
promises.