12V vs Mains Garden Lighting
12V low-voltage is the right answer for most gardens. It is safe, flexible, cheap to alter, and modern LEDs deliver all the output a garden needs. Mains earns its place only for high-output floodlighting, very long cable runs, or fittings that simply are not made in a 12V version.
Side by side
| 12V low-voltage | 240V mains | |
|---|---|---|
| Shock risk | Negligible | Serious — requires RCD protection |
| Cable burial | Conduit at sensible depth | SWA, typically 450–600mm with warning tape |
| Part P notifiable | Only the supply to the transformer | Yes, the whole circuit |
| Altering later | Easy — add a fitting to the run | Electrician required |
| Long runs | Voltage drop must be calculated | Handles distance easily |
| Typical use | Uplights, path lights, borders, steps | Floodlights, large feature lighting |
The voltage drop question
The one genuine limitation of 12V is voltage drop: run too many fittings too far down thin cable and the far end goes dim and slightly green. It is entirely solvable with correctly sized cable, sensible circuit lengths, and a transformer with multiple tapped outputs. It is also the single most common fault we find in DIY and cheap-install schemes — the last three lights on the run never looked right and nobody knew why.
Coastal considerations
On exposed plots in Hastings and St Leonards, the connections matter more than the voltage. Salt air attacks poor terminations relentlessly. Whatever the system voltage, joints should be properly gel-filled or resin-sealed, and the transformer housed in a genuinely weatherproof enclosure out of the prevailing weather rather than screwed to a seaward wall.
Hybrid schemes are normal
Plenty of gardens run a 12V scheme for the garden itself and a single mains circuit for a bright security floodlight or a gate light. There is no rule that says you must pick one.
Have the system specified properly
A design visit includes cable sizing, transformer specification and circuit layout, with a fixed itemised quote and no obligation.
Book a Design Visit
Hastings Garden Lighting Co.
