there's this thing called Kilowatt Hours....typically how they rate electrical device consumption. If you look carefully at your electronic devices you will, most likely, see a sticker that outlines the consumption of electricity.

so, to put it simple terms, say you have 10 80 watt bulbs lit up
right now in your house and kept them on 24 hours a day/night.

what you have here is 800 Kwh times 24 at roughly $.27 a Kwh
and I'd reckon it'd cost around 52 cents a day to keep 10 80
watt light bulbs on for 24 hours a day in your house. And
I'm paying high here......could be less...by a margain