Cost to Run a Incandescent Bulb 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 (5 hours/day), a incandescent bulb here costs $1.13 per month.
Per hour
0.7¢
at 40–100 W
Per day
3.7¢
5 hours/day
Per month
$1.13
9.1 kWh
Per year
$13.58
110 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (2.5 hrs/day) | 1.9¢ | $0.57 | $6.79 |
| Typical (5 hrs/day) | 3.7¢ | $1.13 | $13.58 |
| Heavy (10 hrs/day) | 7.4¢ | $2.26 | $27.16 |
Idaho vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a incandescent bulb in Idaho?
At Idaho's current average residential rate of 12.4¢/kWh (May 2026), a incandescent bulb with typical usage costs about 3.7¢ per day, $1.13 per month, or $13.58 per year.
Is running a incandescent bulb in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 33% below the U.S. average: $1.13 per month here versus $1.68 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.