Low voltage landscape lighting transforms your outdoor spaces from dark, unused areas into stunning nighttime showcases. Whether you want to illuminate a garden path, highlight architectural features, or boost curb appeal and home security, a 12-volt lighting system is the safest, most energy-efficient way to do it.
In this guide we break down the fundamentals — voltage differences, transformers, wire gauges, fixture types, and installation basics — so you can plan your first project with confidence.
What Does “Low Voltage” Mean?
Standard household electricity runs at 120 volts (line voltage). Low voltage landscape lighting operates at 12 volts AC, stepped down from 120V by a transformer. Because 12V cannot deliver a dangerous shock, the National Electrical Code (NEC) classifies it as a Class 2 circuit, which means:
- No electrician’s license is required for installation in most jurisdictions.
- Direct-burial cable can be placed just a few inches underground — no conduit needed.
- Fixtures and connectors are simple plug-and-play; no wire nuts or junction boxes.
The bottom line: low voltage lighting is a true DIY-friendly upgrade that any homeowner or landscaper can tackle over a weekend.
12V vs. 120V: Why Low Voltage Wins for Landscapes
| Feature | 12V Low Voltage | 120V Line Voltage |
|---|---|---|
| Safety | Cannot deliver a harmful shock | Potentially lethal; GFCI required |
| Installation | DIY — shallow burial, no conduit | Licensed electrician, conduit, permits |
| Energy Use | LED fixtures draw 1–5 W each | Higher wattage fixtures typical |
| Flexibility | Easy to move, add, or re-aim fixtures | Hard-wired, difficult to relocate |
| Cost | Lower install cost, lower operating cost | Higher labor and material cost |
For nearly every residential and light-commercial landscape project, 12V is the clear winner. Line voltage is typically reserved for very long runs or high-output flood lights on commercial properties.
The Transformer: Heart of Your System
A low voltage transformer plugs into a standard 120V outdoor outlet and converts the power to 12V. Choosing the right transformer comes down to one key number: total wattage.
How to Size a Transformer
- Add up the wattage of every fixture and lamp on the circuit.
- Multiply by 1.25 (a 25% safety buffer prevents the transformer from running at full capacity).
- Choose the next transformer size up.
Example: 10 path lights at 3 W each = 30 W total. 30 x 1.25 = 37.5 W. A 100W transformer like the Pro-Trade TR2 gives you plenty of headroom for future expansion.
Built-in Timers and Photocells
Most quality transformers include a timer and/or photocell so lights turn on at dusk and off at a scheduled time. The Sollos 100W Transformer comes with both a timer and photocell built in — a convenient all-in-one solution.
Wire Gauge and Voltage Drop
Because 12V systems are sensitive to voltage drop (the loss of voltage over long wire runs), selecting the right landscape lighting wire is critical.
Common Wire Gauges
- 12 AWG (12/2) — The standard for most residential runs up to about 100 feet. A Regency Wire 12/2 100-foot reel is perfect for a starter project.
- 10 AWG (10/2) — Use for longer runs (100 to 200 ft) or higher-wattage circuits. A Paige 10/2 500-foot reel is ideal for larger properties.
- 8 AWG — Heavy-duty; rarely needed for residential but useful for very long commercial runs.
Rule of thumb: Keep voltage at every fixture between 10.8V and 12V. If a fixture reads below 10.8V, step up to a heavier gauge or split the run into two home-run cables from the transformer.
Types of Low Voltage Landscape Lighting Fixtures
Path and Area Lights
Path and area lights are the most common fixture in any landscape design. Mounted 14 to 24 inches above ground, they cast a soft downward pool of light along walkways, driveways, and garden beds. The Pro-Trade PTH1 brass path light is a popular choice for its warm 2700K output and durable construction.
Up Lights and Spot Lights
Up lights are aimed upward at trees, columns, or textured walls to create dramatic shadowing and depth. Adjustable spot lights let you dial in a narrow beam for accent lighting or a wider flood for wall washing.
Wall and Step Lights
Wall and step lights are recessed or surface-mounted to illuminate stairs, retaining walls, and seating areas. They provide safety lighting while adding a clean, architectural look.
In-Grade and Well Lights
In-grade and well lights sit flush with the ground and project light upward through trees and tall plantings. They are excellent for up-lighting palm trees, specimen oaks, and columns.
Hardscape Lights
Hardscape lights are compact fixtures designed to mount under capstones, seat walls, and pavers — perfect for outdoor kitchens and fire pit seating areas.
LED Lamps: The Modern Standard
Today virtually all low voltage landscape fixtures use LED lamps. LEDs consume 75 to 80 percent less energy than halogen, last 25,000 to 50,000 hours, and produce very little heat. The two most common lamp bases in landscape lighting are:
- G4 bi-pin — Used in many path lights and small fixtures. Browse our G4 LED lamps.
- MR16 (GU5.3) — Used in up lights and spot lights for higher output. See our MR16 LED lamps.
Complete Lighting Kits: The Easiest Way to Start
If you are new to landscape lighting, a complete lighting kit is the fastest path from box to backyard. Kits include a transformer, fixtures, lamps, wire, and connectors — everything you need. The Pro-Trade 10-Piece LED Landscape Lighting Kit is a best-seller that includes 10 path lights, a 150W transformer with mechanical timer, wire, and connectors.
Installation Tips
- Plan on paper first. Sketch your property and mark every fixture location, the transformer, and wire routes.
- Start with the transformer. Mount it within 12 inches of a GFCI outdoor outlet and at least 12 inches above grade.
- Use the hub method. Run a dedicated home-run cable from each transformer terminal to a hub, then branch short leads to individual fixtures. This keeps voltage consistent.
- Bury wire 6 inches deep. A flat-blade shovel or edger creates a quick trench; no trencher needed.
- Aim and adjust at night. Turn the system on after dark and fine-tune fixture positions and beam angles.
Frequently Asked Questions
How many lights can I run on one transformer?
Divide the transformer wattage by the wattage of each fixture. For example, a 300W transformer can support 100 fixtures at 3 W each. In practice, apply a 25 percent buffer: 300 x 0.80 = 240 W usable, so roughly 80 fixtures at 3 W.
Do I need a permit for low voltage lighting?
In most U.S. and Canadian jurisdictions, low voltage (12V) outdoor lighting does not require a permit or licensed electrician. Always check your local building department to confirm.
How long do LED landscape lights last?
Quality LED lamps last 25,000 to 50,000 hours. At 8 hours per night, that is 8 to 17 years before a replacement is needed.
Can I mix fixture brands on one transformer?
Yes. As long as every fixture operates at 12V AC and total wattage stays within the transformer capacity, you can mix brands and styles freely.
Ready to Get Started?
Browse our full selection of low voltage lighting fixtures, transformers, LED lamps, and wire to build the perfect outdoor lighting system for your property.