How to Install Outdoor Wired Landscape Lighting

Outdoor wired landscape lighting is one of the best ways to improve the safety and appearance of your yard. A properly installed low voltage system can highlight walkways, illuminate garden features, and make your home easier to navigate at night.

The good news is that most landscape lighting systems are designed for DIY installation. With a transformer, low voltage cable, and a few basic tools, you can install a reliable lighting system in a single afternoon.

This guide explains how to install wired landscape lighting step by step.

Tools and Materials You’ll Need

Before starting, gather the tools and materials required for installation.

Materials

• Low voltage landscape lighting fixtures
• Landscape lighting transformer
• Low voltage landscape wire (12/2, 14/2, 16/2 or 18/2)
• Waterproof wire connectors
• Landscape lighting stakes
• Outdoor timer or smart controller (optional)

Tools

• Wire stripper
• Shovel or trenching tool
• Screwdriver
• Tape measure
• Electrical tape

Having everything ready before you begin makes the installation process much smoother.

Step 1: Plan Your Lighting Layout

Start by deciding where you want lighting in your yard. Common areas include:

• Walkways and paths
• Driveways
• Trees and garden beds
• Patios and outdoor seating areas
• Architectural features of the house

Place fixtures temporarily on the ground to visualize the layout.

A good rule for pathway lights is spacing them about 6 to 10 feet apart.

Step 2: Choose the Right Landscape Lighting Wire

Low voltage lighting systems use two conductor landscape wire to carry power from the transformer to the fixtures. Choosing the correct wire size helps maintain consistent brightness and prevents voltage drop across longer runs.

If you're unsure which size to use, see our guide What Gauge Wire for Landscape Lighting for a more detailed explanation.

Common wire sizes include:

• 18 AWG – Short runs with a small number of low wattage lights
• 16 AWG – Short runs with a small number of lights
• 14 AWG – Medium distance runs
• 12 AWG – Long runs or higher wattage systems

Using the correct wire size helps prevent voltage drop, which can cause lights to appear dim.

Step 3: Install the Transformer

The transformer is the power source for your landscape lighting system. It converts household electricity (120 volts) into low voltage (usually 12 volts) for outdoor lighting.

To install the transformer:

1. Mount it near an outdoor electrical outlet.
2. Install it about 12 to 18 inches above the ground.
3. Plug it into a GFCI protected outlet.
4. Set the built in timer or smart control if your transformer includes one.

Do not turn the transformer on yet.

Step 4: Connect the Landscape Wire to the Transformer

Most landscape lighting transformers have two screw terminals labeled COM and 12V.

To connect the wire:

1. Strip about 1/2 inch of insulation from both conductors.
2. Insert one conductor into the COM terminal.
3. Insert the other conductor into the 12V terminal.
4. Tighten the screws securely.

Low voltage landscape wire is not polarized, so either conductor can go into either terminal.

Step 5: Run the Landscape Lighting Cable

Lay the landscape cable along the path where your lights will be installed.

Tips for running the wire:

• Leave extra slack at each fixture location
• Avoid tight bends in the cable
• Keep wire away from sharp objects or edges

For now, leave the wire on the ground until the system has been tested.

Step 6: Connect the Light Fixtures

Most landscape lighting fixtures use simple clamp style or waterproof connectors.

To install each light:

1. Position the fixture where you want it.
2. Connect the fixture leads to the landscape cable using waterproof connectors.
3. Secure the fixture stake into the ground.

Repeat this process for each fixture along the cable run.

Step 7: Test the System

Before burying the cable, turn on the transformer and test all lights.

Check that:

• Every fixture turns on
• The brightness looks even
• No connections are loose

If any lights do not work, double check the wire connections.

Step 8: Bury the Landscape Cable

Once everything is working properly, you can bury the cable.

Landscape lighting wire is typically buried 4 to 6 inches deep. In many installations, simply pushing the cable under the soil with a shovel is enough.

Avoid burying connectors directly under heavy roots or rocks.

Step 9: Adjust and Maintain Your Lighting

After installation, make final adjustments to the fixtures.

You can:

• Aim spotlights toward trees or walls
• Adjust pathway lights for even spacing
• Ensure fixtures are straight and stable

Basic maintenance includes cleaning lenses, checking connections, and replacing bulbs when needed.

Final Thoughts

Installing wired landscape lighting is a simple project that can dramatically improve the look and safety of your outdoor space. With a transformer, properly sized landscape wire, and a thoughtful lighting layout, you can create a reliable system that lasts for years.

Careful planning and proper wiring will ensure your lights stay bright and consistent across the entire yard.

Disclaimer

This article is provided for informational purposes only. Installation methods may vary depending on your specific equipment, local electrical codes, and property conditions. Always follow the manufacturer’s instructions for your lighting system and consult a qualified professional if you are unsure about any part of the installation process.