Cost to Run a Grow Light in Iowa
Iowa's average residential electricity rate is 16¢/kWh as of July 2026 — the 23rd cheapest in the country, 13% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $20.43 per month.
Per hour
4.8¢
at 100–650 W
Per day
$0.67
14 hours/day
Per month
$20.43
128 kWh
Per year
$245
1,533 kWh
By usage level in Iowa
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.34 | $10.21 | $123 |
| Typical (14 hrs/day) | $0.67 | $20.43 | $245 |
| Heavy (24 hrs/day) | $1.34 | $40.86 | $491 |
Iowa vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a grow light in Iowa?
At Iowa's current average residential rate of 16¢/kWh (July 2026), a grow light with typical usage costs about $0.67 per day, $20.43 per month, or $245 per year.
Is running a grow light in Iowa more expensive than average?
No — it's cheaper. Iowa's rate is about 13% below the U.S. average: $20.43 per month here versus $23.37 nationally.
What does electricity cost in Iowa right now?
Iowa residents pay an average of 16¢ per kWh as of July 2026 — the 23rd cheapest rate of the 51 U.S. jurisdictions we track.