I picked up a couple LED bulbs from the local Menards the other day. They're made by Feit. The bulbs are
19W, 1650 lumens, and they don't use the ballast. I'll post up pictures when I get a chance.
I have to fix one of my fixtures first though. One of the tabs that holds the bulb is broken. I just found out that you can buy those parts, so I just have to figure out which ones fit.