Cost to Run a Grow Light in Montana
Montana's average residential electricity rate is 13.9¢/kWh as of April 2026 — the 7th cheapest in the country, 26% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $17.75 per month.
Per hour
4.2¢
at 100–650 W
Per day
$0.58
14 hours/day
Per month
$17.75
128 kWh
Per year
$213
1,533 kWh
By usage level in Montana
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.29 | $8.87 | $107 |
| Typical (14 hrs/day) | $0.58 | $17.75 | $213 |
| Heavy (24 hrs/day) | $1.17 | $35.50 | $426 |
Montana 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 Montana?
At Montana's current average residential rate of 13.9¢/kWh (April 2026), a grow light with typical usage costs about $0.58 per day, $17.75 per month, or $213 per year.
Is running a grow light in Montana more expensive than average?
No — it's cheaper. Montana's rate is about 26% below the U.S. average: $17.75 per month here versus $24.00 nationally.
What does electricity cost in Montana right now?
Montana residents pay an average of 13.9¢ per kWh as of April 2026 — the 7th cheapest rate of the 51 U.S. jurisdictions we track.