if its magnetic probably not 600w i guessing? last question as for the first question yes mh flood loghts can be used as long as your not talking about halogen lights. they will need a little wireing to make them remote but they will work just fine. those amps are rated at 240 volt you ballast is probably rated at 120 volt or your running a 1000. no those ballasts are standard 400w ballasts 3.6 amps 120volt 1.8 amps 240volt. that website looks shady too