Fluorescent Light In Garage - Mounting Issues
Are you able in the garage attic?  If so you can use the existing junction box and run a wire from it to a new receptacle box where you need it.  Or two boxes for another receptacle and another light later.  If your garage is unfinished then it will be even easier.  If you cannot get to the attic you can use surface mount raceway.



The raceway comes in 5 foot sticks, and has an adhesive on it's back. You can also get clips to attach it to the ceiling and not worry about the adhesive. It's 2 pieces, front &amp; back.  Boxes, flat elbows, tee's and many more accompanying part are available.

If your box is round you can use this extension box.  They do make these in 1 gang boxes also.  It does not have a back to it so you can put it over the box you have and run the wires through the raceway.



To terminate into the box you might use this if you have a 1/2 knockout.



For all the parts available from the company I picked, click here.

The pros on the raceway is it is not too expensive and easy to use.  The raceway is made by lots of companies so there will be different sizes available.  Different fittings and elbows and terminations should be available and some will interchange with other brands.  It should be easy to find at a big DIY box store.

The cons are that it is surface mount and it will be seen.