Is 12V garden lighting safe?

Yes. 12V low-voltage lighting steps mains down through a transformer, so the cabling running through your borders carries only 12 volts. That makes it far safer to run near soil, planting and water than mains cable.

Do I need an electrician for 12V garden lighting?

The transformer connects to a mains supply, and that connection should be done to the relevant electrical regulations. The low-voltage side is safer to work with, but a full scheme is still best designed and installed by a professional so cabling, transformer sizing and IP-rated connections are done properly.

Comparison

12V vs Mains Garden Lighting: Which Is Right for Your Eastbourne Garden?

Q: Is 12V or mains garden lighting better?

For most gardens, 12V low-voltage is better: it's safe near planting and water, flexible to move as a garden grows, and usually installs without armoured cabling. Mains is used where higher output is needed, such as some architectural or security lighting. Many schemes combine both.

Updated July 20266 min readBy Eastbourne Garden Lighting Co.

The short answer

For most gardens, 12V low-voltage lighting is the better choice — it's safe to run near planting and water, easy to adjust as a garden matures, and usually installs without armoured cabling. Mains lighting earns its place where you need higher output, such as some architectural facade lighting or bright security floodlights. In practice, a lot of Eastbourne gardens end up using a mix of both.

It's the first real decision in any garden lighting scheme, and it quietly shapes the cost, the flexibility and the safety of everything that follows. Here's how the two actually differ, and how to tell which your garden needs.

What each one actually is

12V low-voltage lighting runs your mains supply through a transformer that steps it down to 12 volts. The cabling threaded through your borders and buried along paths carries only that low voltage — which is why it's the standard for garden lighting. Mains lighting runs fittings directly on the 230V supply, which means proper regulated installation and, for buried runs, armoured cable.

12V Low-Voltage

Best for most gardens

Safe to run through soil, borders and near water

Flexible — fittings can be repositioned as planting grows

Usually no armoured cable needed, so lower install cost

Ideal for uplighting, path, border and feature lighting

Limited output per fitting — not for big floodlighting

Needs a correctly sized transformer with headroom

Mains 230V

Best for high output

Higher output for security floods and big facade washes

No transformer to house or size

Suits permanent architectural lighting on the building

Buried runs need armoured cable — more labour and cost

Regulated installation; less easy to move later

Overkill (and harsher) for subtle planting lighting

Safety — the honest bit

This is where 12V wins clearly for garden use. A spike light tucked into a damp border, cabling crossing a lawn, fittings near a pond — at 12V, that environment is far more forgiving than mains cable would be. The transformer still connects to a mains supply, and that connection should be made to the relevant regulations, but the network running around your garden stays low-voltage. For planting-led schemes, that safety margin is exactly why the industry defaults to 12V.

Cost

12V generally costs less to install because it avoids armoured cabling and the associated groundwork. Mains points cost more each, which is one reason we reserve them for the fittings that genuinely need the output. If you'd like the full picture, our garden lighting cost guide for Eastbourne breaks down what each element adds.

When we'd choose each

Choose 12V for tree uplighting, borders, path and step lighting, feature and water lighting — the bulk of a typical garden scheme.
Choose mains for bright PIR security lighting, large facade wall-washing, or permanent architectural fittings mounted on the house.
Use both when a garden needs subtle planting lighting and a bright, dependable security light over the drive — which is common.

The Eastbourne coastal note

Whichever voltage you choose, on seafront, Meads, Sovereign Harbour and Pevensey Bay properties the fitting material matters as much as the wiring. Salt air corrodes standard fittings within a few winters, so we specify marine-grade 316 stainless and brass regardless of whether the scheme is 12V or mains. More in our coastal garden lighting guide.

Not sure which your garden needs?

Our design visit includes a plan that specifies the right voltage, fittings and layout for your garden — with a fixed quote and no obligation.

Book a Design Visit

The short version: don't start from "12V or mains?" — start from "what do I want to light?" Decide the effect first, and the right voltage for each fitting follows. That's exactly how we approach it on our garden & outdoor lighting service.