Cost to Run a Grow Light in South Dakota
South Dakota's average residential electricity rate is 15.7¢/kWh as of May 2026 — the 21st cheapest in the country, 15% below the U.S. average. At typical usage (14 hours/day), a grow light here costs $20.05 per month.
Per hour
4.7¢
at 100–650 W
Per day
$0.66
14 hours/day
Per month
$20.05
128 kWh
Per year
$241
1,533 kWh
By usage level in South Dakota
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.33 | $10.02 | $120 |
| Typical (14 hrs/day) | $0.66 | $20.05 | $241 |
| Heavy (24 hrs/day) | $1.32 | $40.09 | $481 |
South Dakota 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 South Dakota?
At South Dakota's current average residential rate of 15.7¢/kWh (May 2026), a grow light with typical usage costs about $0.66 per day, $20.05 per month, or $241 per year.
Is running a grow light in South Dakota more expensive than average?
No — it's cheaper. South Dakota's rate is about 15% below the U.S. average: $20.05 per month here versus $23.49 nationally.
What does electricity cost in South Dakota right now?
South Dakota residents pay an average of 15.7¢ per kWh as of May 2026 — the 21st cheapest rate of the 51 U.S. jurisdictions we track.