In article .com,
writes:
To answer the question stated Phil we would have to know the wattage of
the 240V halogen bulb. If it is a 60 watt, then at 240 volts as
opposed to 120v it will burn much dimmer than a standard 60 watt bulb,
but will last about 2 to 3 times longer. So really the only advantage
you're getting with a 240 volt bulb is longer life. The halogen will
generate less heat if it is the same wattage (60 watt) because it is
burning dimmer. Hope that helps!

I think you wandered into the wrong country...

--
Andrew Gabriel