Cost to Run a Grow Light in Idaho
Idaho's average residential electricity rate is 12.4¢/kWh as of May 2026 — the 1st cheapest in the country, 33% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $15.83 per month.
Per hour
3.7¢
at 100–650 W
Per day
$0.52
14 hours/day
Per month
$15.83
128 kWh
Per year
$190
1,533 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.26 | $7.92 | $95.05 |
| Typical (14 hrs/day) | $0.52 | $15.83 | $190 |
| Heavy (24 hrs/day) | $1.04 | $31.66 | $380 |
Idaho 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 Idaho?
At Idaho's current average residential rate of 12.4¢/kWh (May 2026), a grow light with typical usage costs about $0.52 per day, $15.83 per month, or $190 per year.
Is running a grow light in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 33% below the U.S. average: $15.83 per month here versus $23.49 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 12.4¢ per kWh as of May 2026 — the 1st cheapest rate of the 51 U.S. jurisdictions we track.