How much would u expect around 350 watts of cfl light on 16-8 a month would cost in the uk just trying to get a rough idea of how much this would all cost, does using a cfl cost less than hps lighting etc
168 KWH per month - you need to look at your bill and see what your cost per KWH is and multiply by the 168 KWH used per month.
At my rates you will use about $16.00 per Month.