How much does it cost to run an outdoor floodlight? ($1.53/mo)
Running an outdoor floodlight costs about $1.53 / month
($0.05/day at 6 h/day, $0.17/kWh).
($0.05/day at 6 h/day, $0.17/kWh).
Running cost calculator
Per hour—
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Energy/mo—
An LED floodlight lights a yard or driveway efficiently, and a motion sensor cuts its energy use to near zero when nothing moves.
Cost at different electricity rates
| Electricity rate | Per day | Per month | Per year |
|---|---|---|---|
| $0.10/kWh | $0.03 | $0.90 | $10.95 |
| $0.15/kWh | $0.05 | $1.35 | $16.43 |
| $0.20/kWh | $0.06 | $1.80 | $21.90 |
| $0.25/kWh | $0.08 | $2.25 | $27.38 |
| $0.30/kWh | $0.09 | $2.70 | $32.85 |
| $0.40/kWh | $0.12 | $3.60 | $43.80 |
Cost over time
| Per hour of use | $0.01 |
| Per day (6 h) | $0.05 |
| Per month | $1.53 |
| Per year | $18.62 |
How to spend less running an outdoor floodlight
- Cut the hours: An outdoor floodlight at 6 h/day runs about $1.53/month — trimming one hour saves roughly $0.26/month.
- Lower the setting: running an outdoor floodlight on a lower or eco setting drops the wattage directly.
- Upgrade efficiency: a newer outdoor floodlight near 20 W uses far less than an old 150 W one.
- Kill standby: a smart plug or timer removes the ~1 W it draws even when off.
Want the raw figure? See how many watts an outdoor floodlight uses.
FAQ
How many watts does an LED floodlight use?
Typically 20-150 watts depending on brightness.
How can I lower floodlight costs?
Use motion or dusk-to-dawn sensors so it only runs when needed.