Cost to Run a Grow Light in Illinois
Illinois's average residential electricity rate is 20.5¢/kWh as of April 2026 — the 36th cheapest in the country, 9% above the U.S. average. At typical usage (14 hours/day), a grow light here costs $26.17 per month.
Per hour
6.1¢
at 100–650 W
Per day
$0.86
14 hours/day
Per month
$26.17
128 kWh
Per year
$314
1,533 kWh
By usage level in Illinois
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.43 | $13.09 | $157 |
| Typical (14 hrs/day) | $0.86 | $26.17 | $314 |
| Heavy (24 hrs/day) | $1.72 | $52.35 | $629 |
Illinois 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 Illinois?
At Illinois's current average residential rate of 20.5¢/kWh (April 2026), a grow light with typical usage costs about $0.86 per day, $26.17 per month, or $314 per year.
Is running a grow light in Illinois more expensive than average?
Yes. Illinois's electricity costs about 9% more than the U.S. average, so the same usage costs $26.17 per month here versus $24.00 nationally.
What does electricity cost in Illinois right now?
Illinois residents pay an average of 20.5¢ per kWh as of April 2026 — the 36th cheapest rate of the 51 U.S. jurisdictions we track.