john stone forklarede:
Have a 10Watt, 12Volt Hologen lamp for a christmas decoration. But the
mains tranformer I have is only 6 Volts.

Apart from being a bit dimmer, would there be any other consequences running
at the lower voltage? Thanks.

A bit dimmer?

If the resistance of the lamp was independent of the temperature, which
it is not, the lamp would draw 1/2 the current at 1/2 the voltage,
giving 1/4 the wattage, 2.5w.

However, the resistance _is_ dependent of the temperature. Se more at

http://en.wikipedia.org/wiki/Halogen...on_performance

But the bottom line: Nothing will fail catastropically, but you may get
much less light than expected. But it may look nice and christmassy :-)

Leif
(with a lot of but's ;-))

--
Husk kørelys bagpå, hvis din bilfabrikant har taget den idiotiske
beslutning at undlade det.