Low-Voltage vs Line-Voltage Landscape Lighting
By the JHL Landscape Lighting design team · Updated 2026-06
When you light a landscape, the very first decision is what kind of electrical system carries the power: low-voltage or line-voltage. It sounds like a technicality, but it shapes everything from safety to how easily your design can change over time. For nearly all residential properties, low-voltage is the answer, and understanding why helps explain how a good system is built.
What the two terms mean
Line-voltage, also called high-voltage, runs on the same 120 volts that powers the outlets inside your home. Low-voltage uses a transformer to step that 120 volts down to a safe 12 volts before it ever reaches the yard. Both can technically light a property, but they live in different worlds when it comes to installation, safety, and flexibility.
Safety and installation
Low-voltage systems are dramatically safer to work around. At 12 volts, a nicked cable or a curious child does not present the shock hazard that 120 volts does. That safety margin also means low-voltage cable can often be buried in shallow trenches rather than the deep, conduit-protected runs that high-voltage wiring requires by code. The result is a faster, less invasive installation that protects your existing landscaping.
Line-voltage lighting, by contrast, generally must be installed by a licensed electrician with permitted, code-compliant wiring. That makes it more expensive and far harder to modify once it is in the ground.
Flexibility and design
Landscapes change. Trees grow, gardens fill in, and the light that was perfect three years ago needs to be aimed a little higher today. Low-voltage shines here because fixtures are easy to relocate, add, or re-aim using simple, watertight connectors. You can grow a system zone by zone without tearing up the yard each time.
Low-voltage also offers a huge catalog of compact, beautifully made fixtures from manufacturers like Alliance, Kichler, FX Luminaire, and Tru-Scapes. High-voltage fixtures tend to be bulkier and more limited, which constrains a designer working for a refined, hidden-source look.
When line-voltage still appears
Line-voltage is not obsolete. It can make sense for very long fixture runs where voltage drop would be hard to manage at 12 volts, or for certain large commercial and security applications. But for the typical home, those situations are rare, and the trade-offs in safety, cost, and flexibility almost always favor 12-volt low-voltage.
It is also worth knowing that voltage drop, the gradual loss of power over a long cable run, is a normal part of low-voltage design rather than a flaw. A good installer plans for it by choosing the right wire gauge, splitting the system into zones, and tapping the transformer correctly so the last fixture on a run glows just as brightly as the first.
Every system we build is professional-grade low-voltage 12-volt, engineered so each fixture gets the right voltage and your design can evolve with your landscape for years. If you are deciding how to power your project, request a free consultation and we will map the right approach for your property.
Want this done right the first time? See our Low-Voltage Landscape Lighting service or book a free on-site consultation — 5.0★ across the Main Line & Chester County.