Cost to Run a Grow Light in Idaho
Idaho's average residential electricity rate is 13.7¢/kWh as of July 2026 — the 5th cheapest in the country, 25% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $17.49 per month.
Per hour
4.1¢
at 100–650 W
Per day
$0.58
14 hours/day
Per month
$17.49
128 kWh
Per year
$210
1,533 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.29 | $8.75 | $105 |
| Typical (14 hrs/day) | $0.58 | $17.49 | $210 |
| Heavy (24 hrs/day) | $1.15 | $34.98 | $420 |
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 13.7¢/kWh (July 2026), a grow light with typical usage costs about $0.58 per day, $17.49 per month, or $210 per year.
Is running a grow light in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 25% below the U.S. average: $17.49 per month here versus $23.37 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 13.7¢ per kWh as of July 2026 — the 5th cheapest rate of the 51 U.S. jurisdictions we track.