LED Lighting for Alberta Dairy Farms: Why It's the Highest-ROI Energy Upgrade

Of all the farm types in Alberta, dairy operations have the most compelling case for LED lighting upgrades — and it comes down to a simple fact: dairy barns run lights essentially around the clock.

Most dairy operations maintain an extended photoperiod — 16–20 hours of light per day — because research consistently shows that extended light exposure increases milk production by 6–10% in lactating cows. Some operations run lights 24 hours in milking parlours and holding areas. This means LED lighting in a dairy barn isn't a fixture that runs for a few hours a day. It runs continuously, maximizing both the energy savings and the payback speed of the upgrade.

The Math on a 200-Cow Dairy Barn

A typical 200-cow freestall barn in Alberta running conventional T8 fluorescent or metal halide lighting might have 80–120 fixtures spread across the barn, parlour, holding area, and feed alleys. At an average of 200W per fixture and 20 hours of daily operation, that's:

• 100 fixtures × 200W = 20 kW installed load
• 20 kW × 20 hours × 365 days = 146,000 kWh per year in lighting alone
• At an all-in electricity rate of $0.18/kWh, that's approximately $26,000/year in lighting energy costs

A quality LED replacement — properly specified for agricultural environments — typically reduces power consumption by 55–65% for equivalent or better light levels. Replacing those 100 fixtures with 75W LED high-bays:

• 100 fixtures × 75W = 7.5 kW installed load
• 7.5 kW × 20 hours × 365 days = 54,750 kWh per year
• Annual energy saving: approximately 91,000 kWh = ~$16,500/year

A full LED upgrade for a barn of this size — supply and installation — typically runs $35,000–$50,000 before incentives. With OFEM funding covering a portion of eligible costs, the net investment can be reduced significantly. At $40,000 net investment and $16,500 in annual savings, the payback period is under 2.5 years. After payback, the savings continue for 15–20+ years of LED fixture life.

Animal Welfare and Production Benefits

Beyond energy savings, LED lighting delivers measurable production benefits for dairy operations:

• Consistent spectrum and colour rendering: Quality agricultural LED fixtures provide consistent, high-CRI light that improves visual inspection of animals during milking and health checks
• Flicker-free operation: LED fixtures operating at high frequency eliminate the subtle flicker of fluorescent lighting that can affect animal comfort and behaviour
• Extended photoperiod efficiency: LED's ability to deliver precise light intensity allows for better control of the photoperiod program — maintaining the 150–200 lux recommended for milk production enhancement without over-illuminating
• Reduced heat output: In summer, reduced heat from LED fixtures can marginally improve cow comfort, particularly in lower-ventilation areas of the barn

Demand Charge Reduction

For dairy operations on commercial agricultural rate structures, the demand charge impact of LED upgrades is an important secondary benefit. Reducing installed lighting load from 20 kW to 7.5 kW permanently lowers the demand contribution from lighting — which can reduce peak demand billing during periods when other equipment is running simultaneously.

This demand reduction also has an important implication for solar sizing: lower post-LED peak demand means a smaller, less expensive solar system achieves a higher percentage offset of remaining costs. For dairy operations considering both LED and solar, upgrading lighting first always delivers better combined economics.

LED Before Solar: The Right Sequence for Dairy

A dairy operation that installs solar before LED is sized against the pre-LED load. They pay for a larger solar system than they'll need after LED. When they eventually upgrade lighting, the solar system overshoots the post-LED load — exporting surplus power to the grid at the net metering rate instead of offsetting high-cost self-consumption.

The right sequence is LED first, solar second. The energy assessment step makes this clear, because it identifies the lighting load as a major cost driver before any system is sized.

If you operate a dairy farm in central or southern Alberta, the free energy assessment is the right first step. Book your free audit here or call 403-608-3750.