Replaced the light fixture and box with a regular 1 gang outlet box, and outlet.
The only thing about this second box is I think that a switch and back porchlight feed off these. I think this because there was a wire that had a black/red/neutral/ground in it going into the box, and two other wires going out that just had black/white/ground. so I figure one went to the other overhead light in the garage and the other went to the porchlight/switch.
Either way I just made the same connections back where they were in the circuit, and hooked up the outlet to the red/white/ground like the light bulb was hooked up to.
I'll add pictures of the finished project when I get home. Just need to get some hanging light fixtures from home depoty and I am set!
On a side note, I am so glad I had an additional two circuits added to my garage recently! One for the outlets on the wall over by the workshop area, and another dedicated 20-amp circuit for my welder, because all the items in the ceiling and refrigerator are on a separate breaker so I could still watch TV while doing this work! LOL