When I said 10 I meant 10 amps a 1000w par as it makes it easier to deal with whole numbers and to not overload. So to give you a simple answer 3 1000w par64s. It wasn't meant to be humor just forgot to put amps after the 10.
Amiers seems overlooking that the OP is not in North America. He has 240 V line to neutral voltage and 240 V lamps and other loads.
I also think Stonehedge isn't understanding that there are various worldwide standards, that make his question confusing for most of us. My guess is that he is also miss-using the term "phase." Neutral and earth (ground) are not phases. Assuming you are in the UK, you would measure 240 V between any line/phase to neutral/earth, and 415 V between any two phases. Since I doubt any stage lighting has 415 V lamps, we're talking about a single-phase circuit here.
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