Budget solar lights use NiMH batteries — low capacity, low cycle life, and terrible in cold weather. By November they're already struggling. What you actually need is a lithium-ion or LiFePO4 battery of at least 1,200mAh. These hold charge better in winter temperatures, cycle more times before degrading, and maintain steady output throughout the night rather than fading after two hours.

Always check the battery spec before buying. If the product listing doesn't mention it, assume the worst.

A tiny solar panel glued onto a spike light will never fully charge a capable battery — even on a sunny July day. In the UK, you need a polycrystalline or monocrystalline panel of at least 2W to 4W for any outdoor light expected to run all evening. Monocrystalline panels are more efficient in low-light and overcast conditions — which describes most of the year here.

Some premium solar garden lights include a separate panel on an extension cable so you can angle it toward the sun independently of where the light itself sits. This is worth its weight in gold for north-facing gardens.

An IP rating tells you how well a light is protected against dust and water. For any outdoor light in the UK, you want a minimum of IP44 — though IP65 is the real target. IP65 means the light is completely dust-tight and can withstand sustained water jets. In practice, this means it will laugh off British drizzle, downpours, and the odd hosepipe incident.

Lights with no stated IP rating, or anything below IP44, will corrode, flood, and fail within a single winter. Don't let it happen to you.

Lumens measure actual brightness. Watts mean nothing for LED lights — they only tell you power consumption, not output. For reference: 20–50 lumens gives soft ambient accent lighting. 100–200 lumens works for paths and borders. 400+ lumens is needed for security, driveways, or actually illuminating a space properly.

Many cheap lights are sold with vague wattage claims while hiding the lumen count because it's embarrassingly low. If a listing doesn't state lumens, skip it. For proper solar wall lights, look for 300 lumens or above as a starting point.

The smartest solar lights don't blast full brightness all night — they'd drain the battery by midnight. Good models offer a dim-then-brighten sensor mode: they glow softly all evening and surge to full brightness when motion is detected. This gives you four to eight hours of useful runtime versus two hours of pure maximum output.

Motion sensor solar lights with adjustable sensitivity and detection angles are worth the extra few pounds — especially for driveways, back gates, and entry paths.

Mounted to a wall or fence, solar wall lights are the most practical security and entry lighting option available without running cabling. They typically combine a PIR motion sensor with a dusk-to-dawn photocell — meaning they only activate at night, and only illuminate when something moves within range.

Look for a wide detection angle (120° to 270°) and adjustable sensitivity so passing foxes don't trigger your lights every twenty minutes all night.

If you want your garden to look like something from a glossy magazine, solar festoon lights are your answer. Strung between trees, pergolas, fence posts, or draped over a garden gazebo, they create that warm Edison-bulb glow without a single extension lead in sight.

Prioritise string length (10m is the practical minimum for most gardens), bulb colour temperature (2700K–3000K for warm white), and whether the bulbs are individually replaceable.

The most commonly bought and commonly disappointed category. Path lights are fantastic for guiding guests through a garden, illuminating borders, and defining the edge of a lawn — but only if you buy with the right specs. Check lumens (100+ per light minimum), IP65 rating, and battery capacity.

Also consider spike depth: a 20cm+ ground spike will hold position through ground movement, frost, and determined labradors. Shallow spikes tip over. It's always the shallow spikes.