Solar or wired garden lights? An honest comparison

Short answer: Solar garden lights need no cable and go into the ground in minutes, but their light is weak, how long they shine depends on the sun they got that day, and output drops noticeably in winter, in shade or when the panel is dirty. They suit decoration, marking and corners where running power is hard. Wired (mains) garden lighting shines at the same brightness every night and whenever you want; it is the right choice where safety matters: paths, entrances, steps and front doors. A wired system needs outdoor-rated cable, a 30 mA RCD, fittings with a suitable IP rating and an electrician.

How does a solar garden light work?

A small solar panel on top charges a rechargeable battery during the day; at dusk a light sensor switches the LED on. The light you get at night is therefore limited by the energy collected during the day. Because the panel is small, most models mark a spot or decorate rather than really light a path.

What solar lights do well

• No cable, no digging: push into the ground or fix to a wall in minutes.
• No electricity bill and no wiring cost.
• Practical for remote corners, planters, fence lines and temporary use.
• Flexible for tenants and anyone who likes to move things around.

Where solar lights fall short

• Weak light: a small panel and battery rarely give enough brightness to light a path safely.
• Winter and dull weather: short days and a low sun mean the battery does not fully charge; the light may die before midnight or not come on at all.
• Shade: under trees, by walls or on north-facing sides output drops. The panel charges where the lamp stands, not where the sun is strongest.
• Maintenance: dust and leaves on the panel reduce charging.
• Battery life: rechargeable batteries lose capacity over time; after a few seasons runtime shortens and the battery or the lamp needs replacing.
• Limited control: most only switch on in the dark; no timer, scenes or central switching.

What wired garden lighting does well

• Same brightness every night, regardless of season, weather or shade.
• Safety: paths, steps, the front door and the drive are genuinely lit, reducing trips and falls.
• Control: switch, time switch (an astronomical timer follows sunset), photocell or motion sensor.
• Durability and design: metal, architectural fittings; an LED fitting has no battery to replace.

Where wired lighting falls short

• Installation: cable, underground duct, junction boxes and a separate circuit at the consumer unit. Planned while the garden is being built, it costs far less; digging up a finished lawn or paving is harder.
• It needs an electrician: outdoor connections must be made by a qualified electrician.
• It uses a little electricity, which is low with LED fittings.

Five safety rules for a wired system

1. Outdoor-rated cable: buried directly or in a protective duct, with warning tape above it.
2. 30 mA RCD: the garden circuit must be protected by a residual current device. See RCD types A, B and F.
3. Separate breaker and correct cable size: on long runs voltage drop increases the cross-section; see cable size calculation.
4. Suitable IP rating: fittings exposed to rain need protection against dust and splashing water (e.g. IP54); buried fittings or places where water can collect need more (IP67). See IP ratings explained.
5. Waterproof joints: make connections in sealed boxes or inside the fitting; never leave a taped joint exposed.

Wiring rules differ by country; local regulations always apply.

Which one where?

• Garden path, gate, steps, driveway: wired. Here light is about safety and must work every night.
• Terrace and seating area: wired, dimmable, warm white (2700–3000 K).
• Trees and plants: wired spotlights are far more effective; solar spots only work in full sun.
• Planters, fence lines, far corners, decorative light: solar may be enough.
• Rented home, temporary use: solar.

Often the best result is a mix: safety and main routes wired, small decorative points solar.

A wired garden light: ENGN Lento

We recommend wired lighting in the garden and do not sell solar lights. For paths and entrances we designed and make our own ENGN Lento garden light: a rectangular frame named after the lintel above doors and windows, an anthracite (RAL 7016) powder-coated sheet-steel housing and downward light from a Ø60 mm LED set into the top of the frame. It lights the inside of the frame and the ground in front, without glare and without spilling into the sky. 10 W, 3000 K warm white, IP54; 600 mm (Lento 60) for path edges and borders, 1000 mm (Lento 100) for entrances and gateways. Lento is made to order; the dispatch time is shown on the product page. It is screwed to the ground and must be connected by an electrician on a circuit with residual current protection.

To plan the whole garden, see our garden lighting guide. If you are in Bursa, we install garden lighting circuits, cabling and fittings as part of our electrical contracting service.

• → ENGN Lento garden light
• → Garden and landscape lighting
• → Garden lighting guide
• → IP ratings explained
• → RCD types A, B and F
• → Time switch guide
• → Residual current devices