Most of the time now at my place the AC mains supply sits at around 225 volts. This must be the new POWER SAVING standard. The ordinary room lighting is so gloomy now that I find I need to use a hand held LED spotlight to inspect for finer points of detail. My valve radio receivers now do not work properly as a result of low input to the heaters and resulting low cathode emission. Might look for a different tapping point on the power transformers. Really the mains voltage is way too low. Look out for the future !!!!!