Cost to Run a Grow Light in Illinois
Illinois's average residential electricity rate is 19.2¢/kWh as of July 2026 — the 35th cheapest in the country, 5% above the U.S. average. At typical usage (14 hours/day), a grow light here costs $24.51 per month.
Per hour
5.8¢
at 100–650 W
Per day
$0.81
14 hours/day
Per month
$24.51
128 kWh
Per year
$294
1,533 kWh
By usage level in Illinois
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.40 | $12.26 | $147 |
| Typical (14 hrs/day) | $0.81 | $24.51 | $294 |
| Heavy (24 hrs/day) | $1.61 | $49.03 | $589 |
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 19.2¢/kWh (July 2026), a grow light with typical usage costs about $0.81 per day, $24.51 per month, or $294 per year.
Is running a grow light in Illinois more expensive than average?
Yes. Illinois's electricity costs about 5% more than the U.S. average, so the same usage costs $24.51 per month here versus $23.37 nationally.
What does electricity cost in Illinois right now?
Illinois residents pay an average of 19.2¢ per kWh as of July 2026 — the 35th cheapest rate of the 51 U.S. jurisdictions we track.