Cost to Run a Grow Light in Iowa
Iowa's average residential electricity rate is 14.1¢/kWh as of May 2026 — the 8th cheapest in the country, 23% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $18.00 per month.
Per hour
4.2¢
at 100–650 W
Per day
$0.59
14 hours/day
Per month
$18.00
128 kWh
Per year
$216
1,533 kWh
By usage level in Iowa
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.30 | $9.00 | $108 |
| Typical (14 hrs/day) | $0.59 | $18.00 | $216 |
| Heavy (24 hrs/day) | $1.18 | $36.01 | $432 |
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 14.1¢/kWh (May 2026), a grow light with typical usage costs about $0.59 per day, $18.00 per month, or $216 per year.
Is running a grow light in Iowa more expensive than average?
No — it's cheaper. Iowa's rate is about 23% below the U.S. average: $18.00 per month here versus $23.49 nationally.
What does electricity cost in Iowa right now?
Iowa residents pay an average of 14.1¢ per kWh as of May 2026 — the 8th cheapest rate of the 51 U.S. jurisdictions we track.