When I finally realized I had reached the point I was strapping on my battery powered headlight every single time I went out in the shop to do something, I asked my job electrician (I'm a house builder by trade) for recommendations.
He suggested these 4' long, 2 element LED lights, said he gets them at the local Ocean State Job Lots, a chain store hawking overstock wares for $12 apiece.
I hung a series of them about 6' apart, the shop is about 16' wide; I've found them very adequate.
Best-
George