lights

[jmccann]

certain ceiling lights and table lights in my house, go dim and then bright again as if there is a surge of electricity, only for a few minutes and then goes back to normal.
anyone one know what this might be ? we moved to the house a year ago and had the electrics checked and had extra sockets in certain rooms put in.

thanks

[Ethel]

It is caused by electrical surge - and typically happens when tv soaps are ending and kettles get switched on.

Shouldn't be anything to worry about.

[buildersmate]

If you are saying ALL the lights in the house do this, then it is as Ethel says. The National Grid reduces the supply voltage to certain areas as a means of balancing the load versus the supply on a short term basis. It means that the supply voltage can fall as low as about -10% below the nominal figure. Your eyes are able to detect this in the light output delivered from the lamps.

[spudqueen]

We live in the country with a lot of overhead lines (we've overhead lines to our house) and we get this a lot.