[quote=yamaha_1fan]ok so i read the FAQ's.

a 1000 watt light uses 1000 watts per hour.

[QUOTE]

no watts are a rate not a measure of magnitude. for a 1000Watt bulb you will use 1 kWH (K watt hour) which for me costs 6 cents per kWH.

So thats 24 hours * 30 days * 6 cents/1kWH=43$