How to Install Outdoor Landscape Lighting

Landscape lighting transforms your yard from a dark afterthought into an extension of your home that works both day and night. Done well, it adds depth to plantings, lights pathways safely, and creates an ambiance that makes you want to be outside. The beauty of modern landscape lighting is that it's low-voltage—safer than standard electrical work and simple enough that you can install it yourself without permits or inspectors. You're not running permanent circuits. You're plugging in a transformer, running waterproof cable, and clicking fixtures into place. The real skill isn't the wiring; it's the design—deciding where light serves a purpose and where it enhances the space without washing everything flat. This guide covers the most common system: a plug-in transformer with low-voltage cable running to individual fixtures. We'll skip the complexities of hardwired systems and focus on what works for most homeowners: safe, scalable, and reversible.

1. Find Your Power Hub. Locate a GFCI outlet on an exterior wall, eave, or garage that's protected from standing water and direct spray. Position your transformer within 100 feet of your farthest fixture—voltage drop matters, and longer runs dim the lights. Secure it to the wall or post with the outlet facing downward to shed water. If your outlet isn't GFCI-protected, install a GFCI adapter into the existing outlet before plugging anything in.
2. Map Your Light Blueprint. Walk your yard at dusk and imagine what you want lit: the edge of the driveway, the front bed, the side path, tree trunks, accent shrubs. Sketch it out or mark spots with flags. For pathways, space fixtures 8–10 feet apart. For uplighting trees or shrubs, position lights 12–18 inches from the base, angled upward. For wash lighting across a bed, place fixtures 2–3 feet back from the edge. Cable can run along the ground, buried 2–3 inches, or hidden under mulch—choose routes that avoid foot traffic.
3. Thread the Main Cable. Unroll your low-voltage cable from the transformer toward your first cluster of lights. Lay it on the ground along your planned route, securing it with landscape staples every 2–3 feet if it's exposed, or gently burying it 2–3 inches deep if running through beds. Don't pull it tight; coil excess loosely near the transformer. If you're running multiple zones, bring separate cables from the transformer rather than daisy-chaining them—this keeps voltage consistent across all fixtures.
4. Test First, Bury Later. At your first fixture location, follow the manufacturer's connector system: most modern low-voltage fixtures use push-in connectors or a weatherproof twist-lock. Strip about 1/2 inch of insulation from the cable ends, insert into the fixture connector, and click or twist until it's seated. Before burying or securing the cable, plug the transformer in and test that the light comes on. If it doesn't, reseat the connection or check that the transformer is actually powered.
5. Plug In Each Fixture. Continue laying cable to each additional fixture location. For lights on the same cable run, you can either cut the cable and insert a T-connector to branch two directions, or continue a single line and tap each fixture into it using the connector system. Cut cable with a sharp utility knife—rough cuts can expose bare wire and cause corrosion. Keep all connectors above ground or mulch line until after testing. Position each fixture for aim before securing it; step back and check that light falls where you intended.
6. Lock Everything Down. Once all fixtures are connected and tested, bury exposed cable 2–3 inches deep in beds by slicing the soil with a flat spade and sliding the cable into the trench. You don't need a trench tool for landscape lighting—a spade works fine. Secure each fixture stake firmly into the soil; twist it until it doesn't move when you push on the light head. Cover cable with mulch or soil, leaving fixture connectors slightly exposed or accessible. Coil any excess cable near the transformer and secure it with a cable clip.
7. Dial In the Ambiance. With the system buried and running, step back and verify that each light is aiming where intended. Loosen the fixture head slightly and tilt it to redirect the beam. Most landscape lighting works best on a timer—set the transformer's built-in timer to turn on at dusk and off at your desired bedtime, usually 10 or 11 p.m. Some transformers have dusk sensors that activate automatically. Plug the transformer in, set the timer, and let it run through a full cycle to confirm operation.
8. Protect Against the Freeze. In climates where it freezes, unplug and drain the transformer before the first hard freeze. Drain the low-voltage cable by opening any small drain plugs on the transformer or carefully tilting the cable to gravity-drain it. Store the transformer indoors. Leave fixtures in place—they're waterproof—but they may lose brightness as they age; budget for replacing lamps or LEDs every 3–5 years. Inspect connections each spring for corrosion, and brush debris off fixture lenses so light isn't dimmed by dust or leaves.