Originally Posted by
birdstrike
Exactly. But a 220V 100W bulb should draw no more current than a 110V 100W bulb. They both should have Edison bases, so, I maintain, screwing in a euro bulb and using an adapter on the plug should be perfectly safe.
Actually it should draw 1/2 the current, for the same wattage.
Amps are "volume" of electricity, and volts are the "pressure"
Watts are power. W=V*A. At twice the voltage, only 1/2 the amperage for the same power.
One of the reasons super fast-heating in-room teakettles are so popular in Euro hotels (especially UK) because they don't suck 15-20 amps the way they would in North America. Can run of an ordinary household mains outlet that doesn't have to be the only item on that circuit breaker.