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Most residential systems run at low voltage. A transformer beside an outdoor outlet steps household power down and feeds cable laid through the beds to each fixture, which makes the layout easy to adjust as the garden grows. The line-voltage side, from the outdoor receptacle to any hardwired transformer or buried circuit, is work for a licensed electrician, and every trench, however shallow, begins with a utility locate.
This guide covers the techniques designers use, how a lighting plan comes together, the transformer and wiring choices, the rules for outdoor outlets and digging, keeping the light on your own property, and the upkeep a garden system needs from one season to the next.
Landscape lighting techniques: uplighting, moonlighting, path lights, grazing and water features
- Uplighting: fixtures at the base of a tree, a column or a tall shrub aim upward to reveal its shape and bark.
- Moonlighting: fixtures mounted high in a mature tree shine down through the branches and cast dappled shadows on the lawn below.
- Path and spread lights: short fixtures with a shaded top throw pools of light across a walkway or a planting bed without glare.
- Grazing and washing: a fixture close to a stone wall or a textured fence brings out the surface, while one set farther back spreads even light across it.
- Step and hardscape lights: small fixtures set into risers, retaining walls or deck rails that mark edges for sure footing.
- Water feature lighting: submersible fixtures in a pond or a fountain, made and installed specifically for use in water.
Designing a garden lighting plan: focal points, layers and a night-time walkthrough
Good landscape lighting starts with what you want to see from inside and from the places you sit. The designer or installer chooses a few focal points, such as a specimen tree, a wall or a water feature, then adds softer light along paths and at the edges so the eye travels through the yard instead of stopping at one bright spot. Leaving some areas dark is part of the design: contrast creates depth, and a garden lit evenly from end to end looks flat.
Many installers set fixtures out temporarily and walk the yard with you after dark before any cable is buried, adjusting angles, beam spreads and brightness on the spot. Plan for growth as well, since a young tree's uplight will need to move back as the canopy widens and a shrub can swallow a path light within a few seasons. Ask for a simple plan of the fixture locations, cable routes and transformer, which helps anyone who digs in the garden later.
Low-voltage landscape lighting transformers, cable and fixtures
The transformer is the heart of a low-voltage system. ESA notes that low-voltage lighting uses very little electricity but requires a special isolating transformer, which helps prevent shock and short circuits. It should be rated for outdoor use, mounted where snow, sprinklers and lawn equipment won't reach it, and sized for the total load of the fixtures with capacity to spare for additions. Many models include a photocell or an astronomical timer, so the garden comes on at dusk without a separate control.
Low voltage loses strength over distance, so fixtures at the end of a long or undersized run can look dimmer than those near the transformer. Installers manage this by dividing the yard into several runs, feeding cable from a central point or using a transformer with more than one output. Fixtures with solid metal or composite housings and sealed LED lamps stand up better to frost and string trimmers than lightweight kits, and waterproof connectors keep moisture out of every splice.
Low-voltage, line-voltage or solar landscape lighting: choosing for your yard
Low voltage suits most gardens: the cable can be moved when beds change, the fixtures are small, and the transformer keeps household voltage out of the planting beds. Line-voltage fixtures on a buried household circuit make sense for long distances, powerful lights on tall trees, or fixtures at a gate or an outbuilding far from the house, where a low-voltage run would lose too much. That route calls for cable or conduit buried as the electrical code requires and inspected before the trench is closed, so it's an electrician's project from start to finish.
Solar stake lights are the easy alternative, with no cable at all, but they're dimmer, harder to aim and less dependable through short, snowy winter days, when a panel covered in snow can't charge. They work best as accents in sunny spots rather than as the backbone of a design.
Landscape lighting permits, outdoor GFCI outlets and utility locates before digging
A low-voltage transformer usually plugs into an outdoor receptacle, and that receptacle is where the regulated work lies. ESA states that all 120-volt, 15- and 20-amp receptacles in your backyard must be protected by a Class A GFCI, and that an outlet exposed to rain or snow needs a cover plate marked Extra Duty. Adding that outlet, hardwiring a transformer or burying a line-voltage circuit is electrical work: in Ontario, a Licensed Electrical Contractor files a notification with ESA; in Quebec, a contractor licensed through the CMEQ does it; in British Columbia, the permit comes from Technical Safety BC or the local government. Ask whether the low-voltage portion needs its own paperwork where you live.
Digging comes with its own rule. Even the shallow slits used for low-voltage cable can reach a gas service or a buried power or communications line, and ESA tells homeowners to contact Ontario One Call before anyone digs. Ontario One Call says locates are free, required by law and must be requested at least 5 business days before digging, and that private lines, including landscape lighting and feeds to sheds, are not covered and need a private locator. In Quebec, the Régie du bâtiment du Québec directs requests to Info-Excavation.
Glare and light trespass from garden lights: aiming, shielding and local by-laws
Uplights point at the sky by design, which makes aiming and shielding more important in a garden than almost anywhere else. A beam that overshoots a tree's canopy lights the sky rather than the branches, a bare lamp visible from the neighbour's deck is glare, and a wall-washer aimed across the lot line can end up in someone's bedroom. Some municipalities regulate this: Calgary's Community Standards Bylaw says you can't let outdoor lights shine directly into your neighbour's home, and the City suggests shaded or cut-off fixtures that direct light downward, diffusing lenses and lower output where light spills past the property.
In practice, that means hooded or louvred fixtures, glare guards on uplights near property lines, narrow beams that stay within the tree, and a timer that turns decorative lighting off late in the evening. A walk around the yard and along the sidewalk after installation shows where light escapes before it becomes a complaint.
Landscape lighting maintenance through the seasons: re-aiming, cleaning and winter care
- In spring, straighten fixtures that frost heave or snow clearing has tilted, and reset any stakes that have worked loose.
- Re-aim uplights and move path lights as trees and shrubs grow, since plantings quickly outgrow the original layout.
- Clean lenses and clear away leaves and mulch that bury fixtures or hold moisture around them.
- Walk the system after dark a few times a year to catch failed lamps, dim runs or fixtures that have shifted.
- Check the cable plan before edging, aerating or planting, because shallow low-voltage cable is easy to cut.
- Keep snow piles off fixtures and the transformer, and have a GFCI that keeps tripping checked by an electrician rather than reset again and again.
Landscape Lighting: frequently asked questions
Do I need an electrician for low-voltage landscape lighting?
For the outdoor receptacle, a hardwired transformer or any buried line-voltage circuit, yes: that is regulated electrical work, notified to ESA in Ontario and done by a CMEQ-licensed contractor in Quebec. The low-voltage runs are often handled by a lighting installer, so ask whether a permit applies where you live.
How many lights can one landscape lighting transformer run?
It depends on the transformer's rating and the total wattage of the fixtures. Installers size it for the full load with room for additions, and split long runs so the farthest fixtures stay as bright as the nearest.
Do I need a locate before installing garden lights?
Yes, even for shallow cable. In Ontario, Ontario One Call locates are free and must be requested at least 5 business days before digging. Private lines, including existing landscape lighting cable, aren't covered and need a private locator.
Are solar garden lights as good as low-voltage lighting?
They're easier to place but dimmer, harder to aim and unreliable in winter, when short days and snow limit charging. A low-voltage system gives steady light you can design around, with solar lights as occasional accents.
Can my landscape lights bother the neighbours?
They can, especially uplights near a property line. Calgary's bylaw doesn't allow outdoor lights to shine directly into a neighbour's home, and shielded fixtures, careful aiming and a late-evening shut-off prevent most complaints.
Sources
- Electrical Safety Authority: Make your outdoors even greater
- Ontario One Call: Homeowners
- Régie du bâtiment du Québec: Excavation work
- City of Calgary: Bylaws related to outdoor lights
- Electrical Safety Authority: Notifications and inspections
- CMEQ: A licence is mandatory
- Technical Safety BC: Electrical installation permits
Written by the LokalMatch editorial team. Reviewed by Zubair Afzal on September 10, 2026. How we write and check our guides
