Cost to Run a Grow Light in California
California's average residential electricity rate is 35.3¢/kWh as of April 2026 — the 50th cheapest in the country, 88% above the U.S. average. At typical usage (14 hours/day), a grow light here costs $45.07 per month.
Per hour
$0.11
at 100–650 W
Per day
$1.48
14 hours/day
Per month
$45.07
128 kWh
Per year
$541
1,533 kWh
By usage level in California
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (7 hrs/day) | $0.74 | $22.54 | $271 |
| Typical (14 hrs/day) | $1.48 | $45.07 | $541 |
| Heavy (24 hrs/day) | $2.97 | $90.14 | $1,082 |
California 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 California?
At California's current average residential rate of 35.3¢/kWh (April 2026), a grow light with typical usage costs about $1.48 per day, $45.07 per month, or $541 per year.
Is running a grow light in California more expensive than average?
Yes. California's electricity costs about 88% more than the U.S. average, so the same usage costs $45.07 per month here versus $24.00 nationally.
What does electricity cost in California right now?
California residents pay an average of 35.3¢ per kWh as of April 2026 — the 50th cheapest rate of the 51 U.S. jurisdictions we track.