In case anyone is curious, I posted a design I came up with
tonight by combining lighting configurations which have been proposed.
There are 5 lights on L1 and 6 lights on L2.

I'd be curious if anyone might prefer just the 6 lights on the 1st and
3rd row on one circuit (or extending it to 9 by having 3 uniform rows,
one on top,and middle as shown, and another row of 3 on the bottom)?
Recall that the space is 20' by 24'. There will not be much action on
the 3rd wall however--probably just storage. All of the power outlets
are on the other two walls.

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

I actually went to the store today and located most of the materials
I'll need boxes, appropriate connectors, EMT (thin wall), conduit bender
(probably).

Bill