Timely thread, I just put some new LED 4 ft'ers in my garage.
I tried using the tubes that were supposed to work with the old ballast lights but they didn't work with my fixtures.
So, I ordered new fixtures with 7000 lumens each.
They aren't 'bare' LED's so look a tad more finished than the ones in the original post link.
Got mine from Lowes.
I think these will do for now.
Bare LED's are really harsh, it helps having a diffuser on them.