We created this tool to help you calculate how much energy/electricity you can save for your residential lighting by implementing DC (direct current) power, and intelligent controls such as daylight harvesting and occupancy sensing.
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This calculator assumes that your residential lighting is currently powered by AC (alternating current) power, which is the type of electricity distributed by power grids. It also assumes that your current system has no level of automation other than on-off controls (i.e. wall switches or thermostats).

First, this calculator calculates the current total cost of your lighting based on number of fixtures, watts required per fixture, average cost of electricity, and average hours of daily use (HOU).

Next, the calculator subtracts the amount of energy that could be saved from the original cost of powering your residential lighting.