Originally Posted by John Nolan

There are "plug and play" tubes that don't require rewiring, and then there are "ballast bypass" tubes that require, well, bypassing the ballast. If you're not replacing fluorescents, I'd say led strips are the way to go. I agree that directional lights can cast hard shadows that are less than ideal.

There are a number of "LED garage light" options that screw into existing sockets that might be good to look at.