<a href=showthread.php?s=&postid=14973052#post14973052 target=_blank>Originally posted</a> by sjm817
I use 6 x 60" bulbs and 2 x IC 660 ballasts over a 180. Fewer bulbs, endcaps, wires, ballasts and lower cost than doubling up 36" bulbs. This is a good retrofit setup. If you are going for ready made fixtures, 2 x 36" is not a bad way to go.