The brackets you can buy for these will accomodate both a 52" and 50" light bar on a JK. Just make sure you buy one that mounts from the ends of the light and not the bottom.
I have a 50" on mine and love it for on the beach at night as it lights up the area in front of the bumper. They are absolutely useless on the road though. Get yourself a set of LED spotties for that.
Just be aware with the cheap light bars that they usually throw light everywhere and this can cause a lot of reflections off your bonnet. From memory yours is red? so it shouldn't be too bad. Mines white so I ended up buying a blackout decal for the bonnet. I paid about $100 for it so no big deal.
Also be aware that a light bar across your windscreen will whistle when you are driving. Again, it's an easy fix, just buy some pinchweld or U seal from Clarke Rubber, buy 2 or 3 strips long enough to go along the first 3 cooling fins (from the bottom of the light) that will change the airflow enough to stop it.
A pic of mine