You may be overkilling it a bit honestly. Ever listen to that Kenny Wayne Sheppard song 'Blue on Black'? lol! With all that HPS, some extra flouros in the corners are all well and good, but may not be necessary really.
Look for a bulb marked 'daylight' which is a good all-purpose grow light. The ones marked 'plant and aquarium' are expensive and sucky. I just use 'cool white' in my shop lights. Since it's supplemental lighting, you can pretty much use either.