Quite right! The answer is eight 500-Watt PAR cans. Remember that P=VI, so each socket will carry just 4.4kW
as the supply voltage is 220V.
We are still with Dieter and the lighting rig. Now they are in UK and the caretaker at the venue tells
Dieter that the sockets for lighting rigs are all rated 20 amps and are single phase. His trusty multimeter now
tells him that the mains voltage is 240V AC. How many PAR cans can Dieter run from each socket without blowing