Getting ready to sit down with our PB on Monday for our prebuild conference, and I'm giving the contract a final lookover to see what questions I may have. PB only spec'd for one 500-watt (I think, don't have contract in front of me) Pentair light. Is this going to be enough for a 38x18 freeform pool, depth from 3'-9'? Or should we ask for a second light? TIA