Lou - my personal experience says that you cannot have too much light coverage for your primary workbench. Part of it is simply the more light the better, and the other part is blanket coverage to eliminate shadows when you are using layout tools, handsaws, etc.
To this end, I ended up adding a pair of floodlights on adjustable shop-built overhead fixtures. Someday, I might go back in and add more fixtures.
Once more unto the breach, dear friends, once more;
Or close the wall up with our English dead!