OK, I've wondered about this and tried to figure it out in my head, but thought this would be easier. You can find out for yourself with this [url=https://www.electricity-usage.com/Electricity-Usage-Calculator.aspx?]Electricity Usage Calculator[/url]
For the wattage, add up the watts of each bulb of your lighting set-up.
I know gardening is a hobby and doesn't have to be scrutinized to thoroughly......but it's interesting to know!
I'm at about $1.63 per month.
How about you?