Until relatively recently in Ireland our bulbs were mostly rated 220V. The voltage is now nominally 230V and tends to be somewhere between 215 and 235V in most instances.

I wonder if it's possible that the bulb manufacturer is just making 220V bulbs and sticking 230V labels on them?

It's quite possible that they havent' changed their specs at all.

240V bulbs used in Ireland tended to last for ridiculously long times. There were stories of people crossing the border to northern ireland to pick up bulbs as they lasted far longer.

[This message has been edited by djk (edited 09-19-2005).]