I started a week ago changing my garage to Rural King sourced $29 each LED 4' long 5,500 lumen fixtures. The change is amazing over the old porcelain fixtures that I used 200W compact fluorescent bulbs in, and the light is instant on and a very bright white instead of the dull yellow. I have 5 running down the center of the 26' wide by 38' deep shop/garage so far. I plan to buy more this fall and run 3 or 4 down each outer wall.
When we built this shop we had the lights places down the side of the ceiling and down the center, rather than the old school way of putting lights centered in the bay. This was done because my original house garages had that traditional light placement and no matter what you did on a car/truck you were always in the shadow. Moving the bulbs to the outsides and the center of the 2 bays means that I rarely ever need a drop light now. And with these new super bright/white lights it will only be better.