How much to run a 250w HPS Light

How much to run a 250w HPS Light. I vegging my first WW with flours' and want to take the advice from you experience growers by getting a 250w HPS for flowering.. If this is on 12/12 for about 8-10 weeks does anyone know approx how much it costs to run. Bearing in mind that in the UK we get ripped off for electric along with everything else.

Regards

in the uk it will cost you around £20-£25 roughly per quarter more than enough time to flower!!

lofty i could tell you that i ran out and bought myself a 250 watt mh/hps conversion set up for my first grow and the electric company arrived to read the meter 4 weeks later and increased the quarterly bill by £20