Question: what is 250v in watts?
Answer: 250 v x 1 amp = 250 watt. and the watt-hour (wh) is the unit of power consumption of any instrument. 60 watt bulb means, for example, If the power supply is 250 Volt in your case, then a current of 60 watt / 250 volt = 0.24A will enter (and leave) the light bulb.