When the fluorescent light in the laundry room went kaput, a single 24" tube, I replaced it with a 18" LED strip meant for cabinets. The fluorescent fixture was mounted to a wire storage rack, so it wasn't really meant to be installed there. The LED strip fit the bill perfectly. plenty bright, and was only about $10 more than a new fixture and a new bulb. And I don't have to replace bulbs, and starters any more.
My application is in an enclosed space, I'm not sure how it would be in an open garage space, but I can't wait until they make 48" fluorescent fixture replacements. It's going to make life easy in the winter, be easier on the electrical bill, and not be yellowish color light.