I don't think it is Joe, I have been trying to determine this myself. I got the ballast with my 220G tank but have decided to go the route of 250Ws over it. The model number on the ballast is faded. all I can make out from the faded letters/numbers if that it;s dual which is obvious and that it is 400W. I have a call into PFO to try and get their help determining this. If you or anyone else knows how to determine which PFO model it is I am all ears.
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