How the outdoor lighting estimate works
The calculator converts watts to kilowatts, multiplies by effective runtime, and then applies the electricity price. With the starting inputs, this outdoor lighting uses about 36.0 kWh per month.
Lamp technology, fixture count, dusk-to-dawn controls, motion sensors, and seasonal night length affect use.
How runtime changes the estimate
These scenarios assume the device draws the full starting wattage for the entire runtime. Cycling and variable-speed equipment should use effective runtime or measured kWh.
Estimated monthly cost in high-price states
Practical ways to reduce cost
- Replace frequently used incandescent lamps with LEDs.
- Use motion or scheduling controls where appropriate.
- Aim fixtures carefully instead of adding unnecessary wattage.
Compare related equipment
Frequently asked questions
How much electricity does a outdoor lighting use?
Using a 200-watt starting input for 6 hours per day and 30 days per month produces an estimate of 36.0 kWh per month. Actual use can differ because equipment may cycle or change power.
How much does it cost to run a outdoor lighting each month?
At the latest 2026-05 U.S. residential average price of 18.44 cents per kWh, the starting estimate is $6.64 per month. Replace the inputs with your own numbers for a personal estimate.
What number should I use for the electricity price?
Divide the total electric charges on your latest bill by the total kWh used for an all-in price. State averages are useful for comparison but are not utility-specific rates.
U.S. Energy Information Administration, Electricity Retail Sales, residential average price. Latest monthly data: 2026-05; comparison baseline: 2025 annual. Verified 2026-08-05. Monthly prices can vary seasonally and are not utility-specific rates.