light question

Here's some info from Premium Aquatics.

IceCap 660 Powers up to 440 watts. You can run 2,3 or 4 VHO bulbs off one ballast as long as you do not exceed maximum wattage. This ballast will also run PowerCompacts.

So... 2-4 lamps with no more than 16ft of length, and not exceeding 440watts. :)
 
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you may want to be careful putting 4 6' bulbs on the 660. I had one last year and the issue I ran into was that the starting wattage was not enough to get all 4 of the bulbs to start up. I scrapped the 660 and sold it. I replaced it with individual ballasts(5) for my 5 5' bulbs. The best resource I found was to contact IceCap directly. I called them up and got in touch with one of their techs.
 
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