How much does it cost to run a 300W grow light in Canada?

A 300W LED running 18 hours per day costs approximately $16–$29/month depending on your province. Quebec growers pay around $16/month at $0.066/kWh. Ontario and Alberta growers pay $27–$29/month at $0.17/kWh. Use the electricity calculator above to get an exact estimate for your province and light wattage.

What province has the cheapest electricity for indoor growing in Canada?

Quebec has the cheapest electricity in Canada for indoor growing at approximately $0.066/kWh — about half the cost of Ontario and Alberta. Manitoba is the second cheapest at $0.099/kWh, followed by British Columbia at $0.098/kWh. Growers in these provinces have a significant cost advantage for year-round indoor cultivation.

How do I calculate my grow room electricity cost in Canada?

To calculate your grow room electricity cost: add up the wattage of all devices (lights, fans, humidifiers), multiply each by daily hours of use, divide by 1000 to get kWh, then multiply by your provincial rate. For example: 300W light × 18 hours ÷ 1000 = 5.4 kWh/day × 30 days = 162 kWh/month × $0.14/kWh = $22.68/month. Use our calculator above to do this automatically for all your devices.

Will indoor growing raise my electricity bill noticeably in Canada?

A typical 4×4 tent with a 400W light, inline fan, and climate control adds $35–65/month to your electricity bill in most Canadian provinces. This is noticeable but comparable to running a second refrigerator. In Ontario with time-of-use pricing, scheduling your grow lights to run during off-peak hours (nights and weekends) can reduce costs by 20–30%.

How can I reduce my grow room electricity costs in Canada?

The most impactful change is upgrading to a high-efficiency LED grow light — quality Samsung-diode LEDs from Mars Hydro or Spider Farmer use 30–50% less electricity than older HPS systems while maintaining yields. A smart controller like AC Infinity Controller 69 Pro lets you schedule and dim devices automatically. Measuring actual device wattage with a Kill A Watt meter often reveals surprising savings opportunities.

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Grow Room Electricity Cost Calculator

Calculate exactly what your indoor grow costs in hydro — by province, by device, by month. Know your numbers before you flip the switch.

🇨🇦 Canadian Electricity Rates by Province (2025)

Province	Rate ($/kWh)	300W light / month	Notes
British Columbia	$0.0984	$15.94	BC Hydro Tier 1
Alberta	$0.1680	$27.22	Average regulated rate
Saskatchewan	$0.1630	$26.41	SaskPower average
Manitoba	$0.0994	$16.1	Manitoba Hydro
Ontario	$0.1720	$27.86	Mid-peak average (TOU)
Quebec	$0.0660	$10.69	Hydro-Québec Tier 1
New Brunswick	$0.1283	$20.78	NB Power average
Nova Scotia	$0.1680	$27.22	Nova Scotia Power
Prince Edward Island	$0.1731	$28.04	Maritime Electric
Newfoundland	$0.1307	$21.17	Newfoundland Power
Yukon	$0.1390	$22.52	Yukon Energy
Northwest Territories	$0.3085	$49.98	NWT Power avg
Nunavut	$0.3750	$60.75	Qulliq Energy avg

300W light estimate based on 18hrs/day. Rates are 2025 averages — check your utility bill for your exact rate. Quebec and Manitoba have the lowest rates in Canada; the territories are the highest.

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Common Questions

How much does it cost to run a grow light in Canada?

A 300W LED running 18 hours/day costs $16–$29/month depending on your province. Quebec growers pay as little as $16/month while Ontario and Alberta growers pay $27–$28/month for the same setup. The electricity rate varies more than 3× between the cheapest province (Quebec at $0.066/kWh) and the most expensive territories. Use the calculator above to get the exact cost for your province and setup.

Which Canadian province has the cheapest electricity for growing?

Quebec has the cheapest electricity in Canada at around $0.066/kWh — roughly half the rate of Ontario and Alberta. Manitoba is the second cheapest at $0.099/kWh. British Columbia is also competitive at $0.098/kWh for Tier 1 usage. If you're in Quebec or Manitoba, your grow room electricity costs will be significantly lower than the Canadian average. The territories (Northwest Territories and Nunavut) have the most expensive electricity, at over $0.30/kWh.

How do I reduce my grow room electricity costs in Canada?

The biggest lever is your grow light — it typically represents 60–80% of your total grow room electricity use. Switching from HPS to a quality LED like the Mars Hydro FC series or Spider Farmer SE series reduces wattage by 30–50% while maintaining or improving yields. A smart controller like the AC Infinity Controller 69 Pro lets you schedule fan speed to reduce consumption during lights-off. Finally, a Kill A Watt meter ($35) lets you measure actual device draw — many devices pull significantly less or more than their rated wattage.

Will my hydro bill spike noticeably from indoor growing?

A typical 4×4 tent setup running a 400W light, fan, and humidifier adds roughly $35–60/month to your electricity bill in most Canadian provinces. This is noticeable on your bill but not dramatic — roughly equivalent to running a second refrigerator. In Ontario with time-of-use pricing, scheduling your lights to run during off-peak hours (nights and weekends) can reduce costs by 20–30% compared to running during peak hours.

How do I find my actual electricity rate in Canada?

Check your monthly utility bill — the rate per kWh is usually listed in the rate breakdown section. Ontario uses Time-of-Use (TOU) pricing with different rates for peak, mid-peak, and off-peak hours, so your effective rate depends on when you run your lights. BC Hydro has a tiered system where usage above 1,350 kWh/month moves to a higher Tier 2 rate. If you have a smart meter, your utility's app or website will show your detailed consumption and cost data.