Line Voltage vs Low Voltage Landscape Lighting

Verdict: low voltage wins for most GTA landscape lighting, while line voltage is for hardwired fixtures and higher-output areas

For most homes, the safer and more flexible choice is transformer-based low voltage landscape lighting. It is usually the right fit for path lights, garden accents, step lights, small uplights, and front-yard curb appeal. The transformer reduces normal household power to a lower lighting voltage, so fixture moves, cable routing, and seasonal maintenance are simpler.

Line-voltage outdoor lighting uses regular 120V power. It makes sense for wall-mounted exterior fixtures, garage sconces, porch lights, some post lights, hardwired floodlights, and areas where the fixture is part of the building wiring. Because it is full household voltage outdoors, it needs proper weather-rated boxes, fittings, cable, burial, bonding where applicable, GFCI protection where required, and ESA notification when the work requires it.

Our recommendation for a typical Toronto or GTA home is a hybrid design: low voltage for landscape features and line voltage only where the fixture, location, or load genuinely calls for it. If you are planning a new system, start with a lighting layout first, then choose the wiring method. City Power installs outdoor lighting for GTA homes with ESA notification and inspection where required.

Side-by-side: the practical difference is voltage, risk, and flexibility

Low voltage and line voltage can both look excellent when installed properly. The difference is what happens behind the fixture: how power gets there, how water is kept out, how the cable is protected, and how easy the system is to maintain after the landscaping grows in.

The common mistake is choosing based only on fixture style. A small path light and a large hardwired post light may both sit in the garden, but electrically they are very different jobs.

Low voltage is best when you want curb appeal, adjustability, and easier maintenance

Low voltage is usually the right system for landscape lighting because gardens change. Shrubs grow. Mulch gets refreshed. Interlock settles. Snowbanks and shovels hit fixtures. A transformer-based system is easier to service because the outdoor lighting cable and fixtures are designed around that reality.

A proper low-voltage system still needs planning. The transformer has to be sized for the connected load, mounted in a suitable location, and supplied safely. Cable runs should be laid out to reduce voltage drop, especially on long paths or large lots. Outdoor connectors should be rated for burial or wet locations, not ordinary indoor wire connectors wrapped in tape. Fixtures should be placed so they light the walkway or feature without shining into windows or a neighbour’s property.

Low voltage is especially strong for:

• Front walkways and steps where even, low-glare light matters
• Uplighting trees, stone, brick, and architectural features
• Garden beds where fixture positions may change over time
• Backyards where you want zones, timers, photocells, or smart control
• Retrofits where trenching for full line-voltage wiring would be excessive

The main failure modes are usually simple but annoying: overloaded transformers, undersized cable runs causing dim lights at the end of the line, water-filled connectors, damaged cable from edging tools, and fixtures knocked out of aim. These are design and installation problems, not reasons to avoid low voltage.

If you are comparing budgets, our detailed landscape lighting cost breakdown explains what changes the scope: number of fixtures, transformer size, cable routes, controls, trenching, and access. For broader low-voltage wiring considerations, see our guide to low-voltage cabling cost in Toronto.

Line voltage is best for permanent hardwired fixtures and higher-output locations

Line voltage is the right choice when the fixture is part of the building wiring or needs a permanent 120V supply. Think exterior wall sconces, porch lights, garage coach lights, hardwired motion floods, some lamp posts, and larger site lights. These fixtures are not just sitting in a planting bed; they are connected to the electrical system of the home.

That changes the standard of work. Outdoor 120V wiring needs approved cable or conduit for the location. Underground sections must be buried using a wiring method permitted by the Ontario Electrical Safety Code, with the required protection against physical damage. Exterior boxes need proper covers and gaskets. Splices need to stay dry. Fixtures need to be rated for the location they are installed in: damp, wet, or otherwise exposed.

Line voltage is often better for:

• Building-mounted exterior fixtures controlled from indoor switches
• Motion floodlights at garages, side yards, and driveways
• Post lights where a permanent underground feed is already planned
• Areas needing higher output than small landscape fixtures can provide
• Commercial-style exterior lighting, where the design may overlap with parking lot and site lighting

The most common line-voltage outdoor problems are water in boxes, corroded splices, cracked fixture gaskets, loose photocells, damaged underground cable, and GFCI trips after rain. These are not cosmetic defects. They are signs that water and electricity are meeting where they should not.

If an existing outdoor light trips a breaker or GFCI only during wet weather, do not keep resetting it and hoping it clears. That pattern often points to moisture inside a fixture, box, conduit, cable, or splice. The repair may be as simple as replacing a failed gasket or cover, but the circuit needs to be tested safely.

GFCI, burial, and weather-rated equipment are not optional details outdoors

Outdoor lighting fails faster than indoor lighting because it is exposed to water, soil movement, freeze-thaw cycles, UV, salt, insects, landscaping tools, and physical damage. The electrical design has to assume that the equipment will get wet and disturbed.

GFCI protection is one of the most important safety layers. Depending on the circuit and location, outdoor receptacles, lighting equipment, and related supplies may require GFCI protection. A low-voltage transformer plugged into an exterior receptacle still depends on that receptacle and its circuit being safe. A line-voltage fixture may need GFCI protection depending on the installation. The correct answer comes from the wiring method, equipment instructions, and the OESC.

Burial is another detail that gets underestimated. Low-voltage cable is often easier to route, but it should still be outdoor-rated and protected from foreseeable damage. Line-voltage underground wiring has stricter requirements. The wiring method, conduit, cable type, mechanical protection, and burial depth all matter. Guessing is not good enough, especially in a yard where someone may later install edging, irrigation, a fence, or a garden bed.

Weather-rated equipment matters just as much. We look for fixtures, boxes, covers, connectors, transformers, photocells, timers, and cable that match the exposure. A fixture under a deep porch overhang is not the same as a path light sitting in mulch or a post light exposed to wind-driven rain. Indoor wirenuts, open splices, dry-location boxes, and non-weatherproof covers do not belong in a wet outdoor lighting system.

Maintenance should be built into the design. Good outdoor lighting has accessible transformers, serviceable connections, labelled zones, and enough slack to adjust fixtures without yanking on buried cable. Before winter, check that fixtures are upright, lenses are intact, and cables are not exposed. For temporary seasonal loads, our holiday lighting safety checklist covers many of the same outdoor electrical risks: wet connections, overloaded receptacles, damaged cords, and GFCI protection.

A licensed electrician is needed when the work touches 120V wiring, new circuits, or unsafe existing equipment

A homeowner may be able to place some plug-in low-voltage fixtures, but the safe boundary is clear: when the work involves permanent 120V wiring, a new circuit, a hardwired transformer, underground line-voltage cable, panel work, exterior boxes, or troubleshooting a fault, call a licensed electrical contractor.

Whether you choose line voltage or low voltage landscape lighting, Ontario installations must comply with the Ontario Electrical Safety Code. For landscape lighting installations, City Power Electrical Services operates as a Licensed Electrical Contractor, ECRA/ESA #7015314. Where ESA notification is required, we file it and arrange inspection. That matters outdoors because the inspector may be checking the wiring method, GFCI protection, bonding and grounding where applicable, weather-rated equipment, box fill, cable protection, and whether buried wiring is suitable for the location.

Call an electrician before installation if:

• You need a new exterior receptacle for a transformer
• The transformer will be hardwired instead of plugged in
• You want post lights, pier lights, or driveway lights with underground 120V feeds
• Existing outdoor lights trip a breaker or GFCI in rain
• You see cracked boxes, open splices, rusted fixtures, or exposed cable
• The lighting plan is part of a larger renovation, pool, spa, deck, or landscape project
• You need lighting controlled by indoor switches, timers, photocells, or smart controls tied into house wiring

For a typical GTA home, we recommend low voltage for most landscape lighting zones, supplied from a safe, properly protected outdoor power source. Use line voltage only where the fixture or output requires it, and have the permanent wiring done by a licensed electrician. That gives you the look you want without burying avoidable risk in the yard.

City Power provides free written estimates, full cleanup, and ESA permits and inspections where required. For a safe design before trenching or planting, book professional outdoor lighting installation with our team in Toronto and the GTA.