I know for most autoflowers 24 hours is the norm and some of you use less hours of light for 60+ days at a time so I dug up a calculator that can help you figure out just how much this affects your power bill if you are curious.
This gave me a good idea of what a new HPS light will cost and I am pleasantly surprised to find its not so bad really in terms of cost per month.
http://www.m0ukd.com/Calculators/Electricity_appliance_running_cost_calculator/
This gave me a good idea of what a new HPS light will cost and I am pleasantly surprised to find its not so bad really in terms of cost per month.
http://www.m0ukd.com/Calculators/Electricity_appliance_running_cost_calculator/