How much does it cost to operate my indoor garden lighting system?
Below is a table based on operating the light only 12 hours a day at 8 cents per kilowatt hour. Check your electric bill for your electric rate. Wattage Estimated monthly cost 150 $4.97 250 $8.28 400 $13.25 1000 $33.12 To calculate your energy cost you will need to know 3 things: A: Your cost of energy (usually identified as “KWH” charge on your electric bill) B: The total watts of your lighting system C: The total operating hours (“ON” time) of your lighting system per month. Formula = A * B/1000 * C = Total Energy Cost per month So for the above table: A = $.08 , B = 460, C = 360 hours (12 per day * 30 days) = Total charge of $13.
