Quote Originally Posted by dakar
Actually according to Fulham a WH5 will drive a pair of 65w... but a WH7 will drive them as well without doing any harm.

Here's a great reference page I wrote up for the bulb types and #'s for all of Fulham's fluorescent ballasts.
http://www.captivereefing.com/showthread.php?t=2371
which one would be "better" to use?