Cove Lighting, Done Properly

Most cove lighting fails in one of four predictable ways. The points below are written in the order we would actually raise them on site, because the order usually matters as much as the content — a decision made two steps too late is often no longer a decision, just a repair. Most cove lighting fails in one of four predictable ways. None of what follows depends on style or budget tier; it applies whether the room is being done on a tight number or a generous one. What changes with budget is the material, not the sequence of decisions. Most cove lighting fails in one of four predictable ways. Treat each point as a check rather than a rule — the right answer depends on your room, and the value here is in knowing which question to ask before a decision becomes expensive to reverse. This is written from projects rather than from a general principle, which is why it names specific dimensions and specific failure modes rather than staying at the level of advice. Where your own room differs from the assumption behind a point, the point still applies — just adjust the number. Nothing here requires taking our word for it; each point is the kind of thing you can verify yourself on a site visit or ask a contractor to confirm in writing. That verification is usually the difference between advice that gets followed and advice that gets nodded at and ignored. A few of these points contradict what gets repeated as conventional wisdom. Where that happens we say so directly and explain why, because the conventional version is usually true in general and wrong for the specific case it gets applied to.

We raise this early in every project for the same reason it is worth raising here: it is cheap to decide correctly up front and expensive to correct once the trades that depend on it have moved past it. None of the points below meaningfully change the budget on their own — they change whether the budget you already have is spent on the right things. Getting them right does not cost more; getting them wrong costs a rework later that was never in the original estimate. The right moment to act on any of this is whichever comes first: the design drawing that fixes it, or the trade on site that executes past it. After either, changing course gets progressively more expensive. This matters more than it looks like it should, because the cost of getting it wrong is rarely visible until much later — usually at the point where fixing it means undoing finished work rather than changing a line on a drawing.

Set the strip back far enough

At least 3″ from the cove lip, and 4″ is better. Too close and you see scallops and hotspots on the ceiling instead of an even wash.

Use enough output

12–15W per metre minimum for a genuine wash. Cheap 4.8W strip lights the cove itself and does nothing for the room.

Get the colour temperature right and keep it consistent

2700K–3000K in living areas and bedrooms. Mixing temperatures within one sightline is the most visible lighting mistake there is.

Dim it

A cove at full output all evening is unpleasant. A dimmer costs very little and is what makes the layer genuinely useful.

Plan the driver access

Drivers fail before strips do. Put them somewhere reachable — inside a wardrobe loft or behind an access panel — not sealed inside the ceiling void.