Mains lights are cheaper to buy and far more expensive to own. Here are the five-year numbers.

IP65 is on every outdoor light. Here is what the two digits actually promise — and the two failure points the rating does not cover.

Mains power rarely reaches the places a farm needs light most. Solar fixes exactly that — here is a room-by-room plan.

Auto, timer, manual, brightness. Four modes, and using the right one is the difference between a light that lasts the night and one that dies at 11 pm.

They work all year — but winter changes the maths. Here is the honest version, plus how to survive a cloudy week.

LEDs and panels can last a decade. The battery is the part that decides — and most of its life is in your hands.

Two numbers decide whether a road lighting project looks professional or patchy: mounting height and pole spacing.

A solar street light needs no trench, no cable and no electrician — but the panel direction and tilt decide whether it lasts the night.

All-in-one looks tidy on the spec sheet. Split wins in the real world — here is exactly when each one makes sense.

Choosing between 100W and 500W comes down to three numbers: the area to light, the mounting height and how many hours of light you need each night.