Cost to Run a Grow Light in Illinois
Illinois's average residential electricity rate is 23.9¢/kWh as of May 2026 — the 40th cheapest in the country, 30% above the U.S. average. At typical usage (14 hours/day), a grow light here costs $30.52 per month.
Per hour
7.2¢
at 100–650 W
Per day
$1.00
14 hours/day
Per month
$30.52
128 kWh
Per year
$366
1,533 kWh
By usage level in Illinois
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.50 | $15.26 | $183 |
| Typical (14 hrs/day) | $1.00 | $30.52 | $366 |
| Heavy (24 hrs/day) | $2.01 | $61.03 | $733 |
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 23.9¢/kWh (May 2026), a grow light with typical usage costs about $1.00 per day, $30.52 per month, or $366 per year.
Is running a grow light in Illinois more expensive than average?
Yes. Illinois's electricity costs about 30% more than the U.S. average, so the same usage costs $30.52 per month here versus $23.49 nationally.
What does electricity cost in Illinois right now?
Illinois residents pay an average of 23.9¢ per kWh as of May 2026 — the 40th cheapest rate of the 51 U.S. jurisdictions we track.