British winter doesn't arrive all at once. It seeps in: a fortnight of drizzle, a gale that lifts the bin lid, then a hard frost that finds every tired seal and loose connection in the garden. Outdoor lighting tends to fail quietly in January — a wall light that fills with water, a transformer that gives up, a path marker that flickers for a week and then dies.

None of that is inevitable. An afternoon spent checking ratings, seals, timings and placement will usually carry your porch, path and patio lights through to March without drama. Here's what to look at, in order.

Why the IP Rating Comes First

Every outdoor fitting sold in the UK carries an IP (Ingress Protection) rating: two digits describing what it resists. The first covers solids — dust, grit, insects. The second covers water, and for anything living outside, that's the digit that matters.

• IP44 — splash-resistant. Fine under a deep porch roof or a generous overhang, not fine in open rain.
• IP65 — dust-tight and protected against water jets. A sensible default for wall lights, bollards and anything fully exposed.
• IP66 — stronger jets. Worth considering on the coast, or anywhere a gutter overflow or hosepipe is a risk.
• IP67 and IP68 — temporary and continuous immersion. The realistic choice for ground-recessed uplighters and pond-side fittings, provided the cable entry is sealed too.

Two cautions. An IP rating describes water and dust, not corrosion or impact — salt-laden wind will pit a cheap casting long before water gets inside it. And the rating applies to the fitting as installed. A neatly made IP65 light wired through an unsealed gland becomes an IP44 light at best.

The Parts You Never See

Water rarely enters through the lens. It comes in through the cable entry, a flattened gasket, or a joint box sitting in a puddle under the patio.

• Cable entry: feed the cable from below where you can, and form a drip loop so water runs off before it reaches the gland.
• Gaskets and seals: check them each autumn. If a rubber seal is cracked or flattened, replace it. A smear of silicone grease keeps it supple and stops the threads seizing.
• Connectors: use proper IP-rated outdoor connectors rather than a domestic junction box wrapped in tape. Keep joints above ground level and inside an enclosure.
• Transformers and drivers: keep 12V and 24V units indoors or in a correctly rated box. They dislike damp and heat in equal measure.
• Drainage: recessed uplighters need gravel or a drainage sleeve beneath them, otherwise they sit in a sump.
• Cables: clip them rather than burying them a spade's depth under the lawn. Ducting or armoured cable is worth the trouble.

Timers, Sensors and Dusk-to-Dawn Control

Leaving everything on from four in the afternoon until midnight is the quickest way to irritate the neighbours, waste electricity and shorten the life of the fittings. Control is part of weatherproofing.

1. Decide what each light is actually for: welcoming at the door, safe on the steps, atmospheric on the patio.
2. Set a plug-in or in-line timer for the hours you need. Mechanical timers drift with the seasons, so expect to adjust them.
3. Use a photocell or astronomical timer for anything you want on at dusk. These follow the changing sunset instead of your memory.
4. Fit a PIR sensor on paths and side gates, where light is only wanted when someone walks through.
5. Run it for a week, then adjust the on and off times once, properly.

Check the timer's own rating too. An indoor timer in a damp shed will fail. If the socket itself lives outdoors, it should be a weatherproof IP-rated socket with a closeable cover, ideally on an RCD-protected circuit. Adding outdoor sockets or new circuits is a job for a registered electrician, and worth getting professional advice on rather than improvising.

Placement: Porches, Paths and Patios

Porches

Light the door, not the visitor's eyes. A wall light at roughly shoulder height, offset to one side of the door and angled downwards, gives a warm pool of light and shows the lock. Choose a hooded or downward-facing design that keeps rain off the lens — upward-facing bowls collect water and leaf litter, and they discolour fast.

Paths and steps

Steps are where people trip, so light them rather than decorate them. Bollards or low markers every few metres, or a strip tucked under a step nosing, show the edge of each tread without glare. Glare is the real enemy: a bright lamp at eye level makes the ground beyond it look darker. Keep levels low and even, and aim fittings across the path rather than straight down it.

Patios and decking

Deck lights set into the boards need to be IP67 and fitted so water drains away beneath them. Downlights on the house wall wash the patio without planting a lamp in the middle of the furniture. Keep cables and fittings well clear of fire pits and outdoor heaters — heat and plastic do not mix. And look at where the beam lands at night: nobody wants a bright wash across a neighbour's kitchen window.

A Pre-Winter Checklist

Do this on a dry, bright afternoon in October, while you can still feel your fingers.

• Switch everything on after dark and note anything flickering, dim or dead.
• Match each fitting's IP rating to its position: sheltered under a roof, IP65 or better out in the open.
• Inspect gaskets, glands and cable entries; reseal or replace anything tired.
• Empty water from uplighter housings and clear leaf litter from grilles and drains.
• Tighten bracket screws, ground spikes and wall fixings — gales test them.
• Press the test button on the RCD and check outdoor socket covers close properly.
• Confirm timers still switch at the right times, and replace backup batteries in mechanical models.
• Clean the tops of solar panels; low winter sun needs a clear surface to work with.
• Note anything that needs replacing now, rather than during a January storm.

Keeping It Right Through to Spring

A short routine keeps the system honest. Once a month, walk the garden after dark and look for changes: a fitting gone dim, a cable that has sagged, water where water shouldn't be. After a storm, check fixings and cable clips. On the coast, rinse metal fittings with fresh water a few times over winter to slow salt corrosion.

If anything involving mains voltage looks doubtful — a cracked housing, water inside a 240V fitting, a socket that keeps tripping — switch it off at the consumer unit and have a qualified electrician look at it. Outdoor electrics and water are a poor combination to troubleshoot by guesswork.

Come spring, the reward is simple: a porch, path and patio that light up the moment you need them, with nothing left to fix in the cold.