When Calgary homeowners research landscape lighting, one of the first questions they ask is: solar or wired? Solar lights seem attractive — no wiring, no electrician, cheap to buy. Low-voltage wired LED systems seem like more work. But in Calgary’s climate, the answer is clear, and this guide explains why. J.G. Irrigation installs professional low-voltage wired landscape lighting throughout Calgary. Here is an honest comparison of both technologies in an Alberta winter climate.
The Core Difference: How Each System Works
Solar Landscape Lighting
Solar garden and pathway lights contain a small photovoltaic (PV) cell on the fixture’s top face, a small rechargeable lithium or NiMH battery inside the fixture body, and an LED element. The PV cell charges the battery during daylight; the battery powers the LED at night. Each fixture is a self-contained, independent unit with no wiring between fixtures.
Low-Voltage Wired LED Lighting (Professional)
Professional low-voltage landscape lighting systems use a 12V AC transformer wired to a low-voltage cable that runs through your yard. Individual fixtures — path lights, spotlights, uplights, deck lights — tap into the cable at each location. The transformer connects to a standard outdoor outlet and controls all lights via a built-in timer or smart-home integration. All fixtures run from one power source and can be controlled as a system.
How Solar Lighting Performs in Calgary
Solar landscape lighting has a fundamental physics problem in Calgary: Alberta winters are cold, dark, and long. Each of these factors independently reduces solar lighting performance. Together, they make solar a poor choice for year-round Calgary landscape lighting.
Problem 1: Short Winter Days = Insufficient Charge
Calgary receives approximately 8 hours of daylight on the winter solstice (December 21). In late October and November, daylight drops rapidly — by November, Calgary has roughly 9 hours of daylight. Solar fixtures need 6–8 hours of direct sunlight to fully charge. But:
- In Calgary, October through March frequently has cloudy, overcast days that dramatically reduce PV cell charging efficiency — sometimes to 10–30% of clear-sky output
- Snow and ice cover the PV cell face, reducing charging to near zero until the fixture is manually cleared
- At low winter sun angles in Calgary’s latitude (~51°N), the sun barely clears the horizon in December — PV cells oriented horizontally on the top of a path light capture very little of this low-angle light
Result: Calgary solar landscape lights typically provide only 30–60 minutes of dim light on winter nights, instead of the 4–8 hours of bright output they achieve in summer. Many simply fail to illuminate at all by December.
Problem 2: Battery Performance in Cold
Lithium-ion and NiMH batteries — used in virtually all solar landscape lights — lose a significant percentage of their capacity in cold temperatures. At -20°C (a common Calgary January temperature), lithium-ion batteries can lose 25–40% of their rated capacity. At -30°C (not unusual in a Calgary cold snap), performance drops further. This compounds the short-charge problem: not only does the battery charge less (short days, snow cover), it also holds less of whatever charge it does receive.
Problem 3: Fixture Degradation
Consumer-grade solar landscape light fixtures are typically made from ABS plastic and thin aluminium. In Calgary’s temperature cycling — from +35°C in July to -35°C in January, a 70°C range — these plastics become brittle within 2–3 seasons. The PV cell’s transparency (usually a plastic lens, not glass) yellows and hazes from UV exposure, further reducing charging efficiency. Most consumer solar lights have a practical lifespan of 2–3 years in Calgary before they need replacement.
How Low-Voltage Wired LED Lighting Performs in Calgary
Professional low-voltage wired LED landscape lighting is unaffected by Calgary’s winter conditions:
- Performance is identical year-round: The transformer connects to grid power. Short days, snow, and cold have zero effect on light output. Your fixtures run at full brightness from October through March, every night.
- Timer control is precise: A smart transformer with astronomical timer adjusts on/off times with the changing sunset, so your lights always turn on at dusk and off at your set bedtime regardless of season.
- Professional-grade fixture durability: Quality landscape lighting fixtures (Vista, Kichler, Unique Lighting, FX Luminaire) are made from solid brass, copper, or powder-coated cast aluminium with glass lenses. They withstand Calgary’s temperature cycling, hail, UV exposure, and winterization without degrading. Expected lifespan: 15–25 years.
- LED efficiency: Modern low-voltage LEDs use 3–8 watts per fixture. A 10-fixture path light system draws 30–80 watts total — less than one light bulb. Annual operating cost is negligible (approximately $20–60/year at Calgary electricity rates).
- System controllability: All fixtures are controlled from one point. Smart transformers integrate with Google Home, Alexa, and smartphone apps for full remote control.
Cost Comparison: Solar vs Wired in Calgary
| Factor | Solar Lights | Wired Low-Voltage LED |
|---|---|---|
| Purchase cost (10 fixtures) | $80–$300 (consumer) | $800–$2,500+ (professional) |
| Installation cost | DIY (spike into ground) | $500–$1,500 (contractor) |
| Total upfront cost | $80–$300 | $1,300–$4,000+ |
| Replacement cycle (Calgary) | 2–3 years | 15–25+ years |
| Total 10-year cost | $240–$900+ | $1,300–$4,000 (once) |
| Annual electricity cost | None | $20–$60/year |
| Winter performance | Poor to none | Full brightness year-round |
| Fixture quality/appearance | Consumer grade | Architectural grade |
10-year cost verdict: Solar looks cheap upfront but replacement cycles make the 10-year cost competitive with a properly installed professional wired system — without the year-round performance, design quality, or property value impact.
When Solar Lighting Makes Sense in Calgary
Solar has a narrow but legitimate use case in Calgary:
- Remote locations with no power access: Outbuildings, back fences, or areas where running low-voltage cable is impractical
- Seasonal summer-only use: If you only need lighting June–August (e.g., seasonal garden parties), solar performs adequately in Calgary’s long summer days
- Temporary or rental situations: Where permanent installation isn’t appropriate
For any application requiring reliable year-round performance, professional appearance, or property value impact, low-voltage wired LED is the clear choice for Calgary.
J.G. Irrigation’s Landscape Lighting Services
J.G. Irrigation installs professional low-voltage LED landscape lighting systems in Calgary and surrounding communities. Our standard residential installation includes:
- On-site lighting design consultation — fixture placement, beam angles, circuit planning
- Professional-grade fixtures from leading manufacturers (Vista, Kichler, or comparable)
- Low-voltage cable burial (6-inch minimum depth) for a clean, invisible installation
- Smart transformer with astronomical timer and optional app control
- Post-install adjustment visit (30 days) to tune beam angles and confirm coverage
See our landscape lighting installation service page for full details, or our outdoor lighting Calgary guide for design inspiration.
Frequently Asked Questions
Can I convert my existing solar lights to a wired system?
No — solar fixture bodies and wired fixture bodies are not interchangeable. A wired system installation requires new fixtures designed for low-voltage connection. However, if your existing solar lights are failing (common in Calgary after 2–3 years), a full replacement with a professional wired system is the practical solution. J.G. Irrigation can remove the old solar fixtures and install a complete new wired system in the same appointment.
Do wired landscape lights need to be removed for Calgary winter?
No — professional low-voltage wired landscape fixtures are designed to remain in place year-round. Unlike solar fixtures (which can be brought inside), wired fixtures are permanent installations. The fixtures themselves are rated for Calgary’s temperature range. Simply turn off the transformer timer in November if you prefer not to run lights in winter — but many Calgary homeowners run their landscape lights all winter for security and curb appeal.
Book a Landscape Lighting Consultation in Calgary
Call J.G. Irrigation at 587-433-4795 or contact us online to book a free on-site landscape lighting consultation. We design, supply, and install professional low-voltage LED systems throughout Calgary, Airdrie, Cochrane, Okotoks, Chestermere, and Langdon.
