I need the formula for kw used for a light bulb

[Jim33063]

I am looking for the formula for kilowatt hour operating cost.
thank you
Jim

 

[charlie b]

Start with Watts (as in, for example, a 100 watt bulb) times the duration of its being turned on (for example, 24 hours a day times 30 days in a month). That gives you the energy used during the month, in units of watt-hours. If needed, divide by 1000, to get the same amount of energy in units of kilo-watt-hours. Multiply that times the price per watt-hour (or per kilo-watt-hour, as appropriate), and you have cost per month.

 

[bob]

I am looking for the formula for kilowatt hour operating cost.
thank you
Jim

(watts x hours)/1000 x utility kwh rate. eg. (100 w x 24 hrs)/1000 x .08 cents per kwh = 0.19 cents

 

[barclayd]

Dollars & Cents
" .08 Cents Per KWH " is one Screamin' Deal.
8 Cents ain't so bad, either. (we pay about 5)
db

 

[chaterpilar]

0.08 cents looks normal deal...and at 5 cents somebody is making lots of money...

 

[kingpb]

I think that's $0.08 (US dollars) or 8 cents, watch units.