Outdoor LED lights give the same brightness as old halogen and incandescent fittings for a fraction of the electricity, and they come on at full output on a frosty night with no warm-up. In a garden that changes three things: you can leave a path or porch light on for hours without worrying about the bill, you rarely climb a ladder to change a lamp, and you can pick the exact warmth of light that suits brick, timber and planting.
“LED” covers several quite different set-ups outdoors, though, and the difference matters more than the shape of the fitting.
Mains-powered LED garden lights run at 230 V and are wired permanently into the house supply. They suit wall lights by the door, bollards along a drive and floodlights over a garage – anything that should work every night of the year. New outdoor wiring has to meet BS 7671, which in practice means armoured or suitably protected cable, weatherproof junction boxes and a circuit protected by a 30 mA RCD. It is a job for a registered electrician.
Low-voltage systems run at 12 or 24 V from a transformer that plugs into an outdoor socket. The cable is safe to handle, spike lights can be moved as borders grow, and most kits can be extended later. Size the transformer with 10–20% headroom over the total wattage, and keep cable runs reasonably short: voltage drops along the line and the last light in a long run will look dimmer.
Solar LED lights need no cable at all, but in a British winter a panel collects little charge, so treat them as decoration rather than security lighting.
Many modern outdoor lights have the LEDs built in on a circuit board with their own driver. That allows slim wall lights, low-profile deck lights and very compact up-and-down fittings. The trade-off is repair: if the module or driver fails years later, you replace the module – or, if the maker has not designed one to be swapped, the whole fitting.
Fittings with a lamp holder (E27, GU10, GX53, G9) take an LED bulb instead. You can change colour temperature or brightness whenever you like and a fault costs one bulb. Choose bulbs rated for enclosed fittings: heat builds up behind sealed glass in summer, and heat shortens LED life far more than cold ever does.
Typical values for a domestic garden in the UK:
| Where | Light output per fitting | Colour temperature | IP rating |
|---|---|---|---|
| Porch or front door, under a canopy | 400–800 lm | 2700–3000 K | IP44 or higher |
| Exposed wall, up-and-down light | 2 × 150–400 lm | 3000 K | IP54–IP65 |
| Path bollard, every 2–4 m | 100–300 lm | 2700–3000 K | IP54–IP65 |
| Spike spotlight on a shrub or tree | 150–500 lm | 2700–3000 K | IP65 |
| Driveway or side return | 1000–2000 lm | 3000–4000 K | IP65 |
| Deck or ground light you can walk on | 50–200 lm | 3000 K | IP67, IK08–IK10 if driven over |
A good LED fitting usually delivers 80–120 lumens per watt, so a 6–8 W wall light matches an old 60 W bulb. Rated life is commonly quoted at 25,000–50,000 hours, often as an L70 figure – the point at which the LED still gives 70% of its original output.
Warm white at 2700–3000 K flatters planting, stone and timber and feels right on a patio. Keep 4000 K for places where seeing clearly matters more than mood, such as a drive or bin store. Moths and other insects are drawn mostly to bluer light, so warm white – or amber around 2200 K near hedges and ponds – disturbs them less.
Glare is the other half of good outdoor lighting. Angle floodlights down, not across the garden, choose shielded fittings on boundary walls and avoid lighting a neighbour’s bedroom window. A light that shines where it is needed is also the one that looks best.
One whose IP rating, housing material and colour temperature suit its spot. Powder-coated aluminium or stainless steel, warm white light and a replaceable bulb or module are a sound starting point.
They can be either. Many are 230 V mains fittings for permanent wiring. Others run at 12 or 24 V from a transformer, and some are solar or battery powered.
Plug-in low-voltage kits are designed for exactly that: the transformer goes into a weatherproof outdoor socket. A fixed mains fitting should be wired in by an electrician rather than fed from a plug and extension lead.
Yes. Artificial light can count as a statutory nuisance, and councils do investigate persistent glare into homes. Aiming lights downwards and choosing sensible brightness avoids almost every dispute.
Several warm white fittings of around 300–600 lm each – wall lights, low bollards or soft downlights in a pergola – rather than one bright floodlight.
Yes. LEDs run more efficiently in the cold. What fails in winter are seals and glands that let water in, so careful installation matters more than the label.
More on fitting types, from bollards to wall lights: outdoor lighting. If the porch light should switch itself on as someone walks up, read about outdoor lights with a motion sensor.
