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Installing a ceiling light: fixing, wiring, choosing

This article is also available in French: Installer lampe plafond

26/09/2026 · 7 min read · By the Designix team

How to install a ceiling light, step by step

Switch off the lighting circuit breaker, remove the old fixture, fasten the mounting plate into the existing holes, tighten without forcing, reconnect the wires and refit the diffuser. The tools fit in one pocket: insulated screwdriver, voltage tester, spirit level, connector block or wago.

Which fixing for which lamp, depending on your ceiling

	DCL box (surface-mounted)	Hook and chain (suspended)	Spacer on plasterboard	No drilling, on plug
What the fixing assumes	An electrical supply and a box already in place	A support tested in traction before installation	A located lining and a distributed load	An accessible socket, no connection to the ceiling
Intended luminaire weight	Light to medium, flush against the ceiling	Medium to heavy, the chain relieves the cable	Medium, distributed over the whole plate	Light
Height adjustment	None	To the link, after installation	Limited	None
Suitable for	Ceiling lights, LED panels and downlights	Chandeliers, pendants, large volumes	Rooms mounted on plasterboard	Rentals and fragile partitions
Avoid if	The box is cracked or the supply is old	The support has never been tested	The luminaire exceeds what the plate can bear	The luminaire is heavy or must fall exactly in the centre
Typical luminaire style	Contemporary, minimalist	Chandelier, bohemian, industrial	Depending on the chosen model	Offset table lamp

One question settles half the work before you even climb the stepladder: is your fixture surface-mounted, suspended or recessed? On a survey of 127 references from our ceiling lamp collection as of 26 September 2026, 84% of the listings that specify the mounting describe a surface-mounted installation, 9% suspended, 2% recessed. The fixing gesture changes completely from one case to another.

How to cut the power before dismantling: checking with the tester

Flip the lighting circuit breaker at the consumer unit, never the wall switch. A switch cuts the live wire but leaves the neutral present at the ceiling, which is enough to cause damage.

Tester placed between live and neutral, then between live and earth: with no display, the circuit is dead.
Circuit breaker identified at the consumer unit before climbing, not a torch in hand.
Two checks: one before dismantling, a second before reconnecting.
Adjacent switches locked off during the work if the home is occupied.

Fixing the mounting plate: hole marking, level, tightening

Hold the mounting plate against the ceiling, mark the holes with a pencil, check the horizontal with a spirit level before drilling. A surface-mounted ceiling light that is crooked is immediately visible: raking light highlights every millimetre of deviation.

Tightening is done in two stages, by hand then with the tip. A plate that floats by two millimetres transmits vibration to the plaster and eventually marks the slab around the screws.

How to fix a chandelier to the ceiling, with or without a hook?

A light chandelier holds on a toggle hook properly anchored in the slab. A heavy chandelier requires a threaded rod or a mounting bar secured to the structure. The original hook is only sufficient if it is itself attached to the support, not to the plaster.

Fixing a heavy pendant to the ceiling

Only two solutions: the threaded rod sealed into the slab, or the metal mounting bar that transfers the load to two spaced points. The second is installed without adhesive, provided the support accepts drilling.

Threaded rod sealed: the most discreet, it passes through the plate and disappears.
Mounting bar: two anchors instead of one, designed for large volumes.
Toggle hook: reserved for light fixtures, it works in traction on the plate.
Lock nut under the plate: it prevents the fixture from turning during cleaning.

The larger models are described listing by listing, including mounting method, in our pendant light collection. Knowing the actual weight and the nature of the support settles the question, and our guide to hanging a chandelier details both cases.

Fixing a ceiling lamp on plasterboard

On plasterboard, the load is never taken by the board alone. It is transferred to a spacer slipped behind, or to the metal structure located with a magnet.

Support	Fixing	Limit
Concrete slab	Hammer-in anchor or sealed rod	No restriction for normal weight
Plasterboard on rail	Spacer or Molly anchor	Light to moderate fixture
Plasterboard without rail	Through spacer required	Load taken on two points
DCL box	Box screws plus additional fixing	Does not carry a heavy fixture

Our guide to installing a chandelier details mounting on a spacer, including locating rails with a magnet. And if the room has an attic, a light for a sloped ceiling is chosen on one more criterion: the swivel joint of the mounting plate.

Doubt often concerns durability over time. Our Google listing gathers feedback from buyers who installed their fixture themselves.

How to wire the wires of a ceiling lamp

Three markers are enough: the green-yellow earth on the earth terminal, the blue neutral on N, the red, brown or black live on L. One connector block or wago per conductor, never two bare twisted wires under the same screw.

How to wire a ceiling lamp with two wires

The fixture offers only two conductors, blue and brown, when the ceiling has three. The earth then remains unconnected, neatly coiled inside the box: this is the case intended for a double-insulated fixture, indicated by the two concentric squares.

Blue on neutral, brown or black on live: the logic does not vary.
Earth not connected only if the fixture is double-insulated.
Sleeve kept up to the terminal entry, to avoid sheared copper.
Tightening tested by gently pulling on each wire after screwing.

The details of the terminals and the mistakes to avoid are in our article on wiring a ceiling light.

Three wires at the ceiling, two wires at the luminaire: the common case

This is the most frequent configuration in an older home. The existing earth is not decorative: it remains coiled in the box, never cut flush with the sleeve, in case you change the fixture later.

Identifying wires without a multimeter, and the method to wire a ceiling lamp whose colours have faded, are covered step by step in this guide.

If connecting to the consumer unit makes you uneasy, write to the Designix workshop: a poorly tightened wire always costs more than a question asked beforehand.

Which ceiling lamp for which room

A surface-mounted ceiling light for a circulation area or a low bedroom, a pendant above a table or an island, a chandelier when height allows. Trade rule: nothing in the field of view of a seated person, except above a worktop.

Ceiling light, pendant or chandelier: what our catalogue says

Our counter shows 4,772 references in the Ceiling Light, Ceiling Lamp and Ceiling Lighting collection as of 26 September 2026. Of the 127 listings recorded on the same date, contemporary style stands out at 66%, metal in 80% of listings that declare a material, white at 48%. The whole can be browsed under the lighting entry.

Ceiling lights and pendants ready to install

See the full selection: Ceiling Light, Ceiling Lamp and Ceiling Lighting

For a bedroom, a low and diffused ceiling light avoids glare from the bed. For a living room with good height, a chandelier structures the room as much as it lights it.

Dimming and colour temperature

On the same survey, 13% of listings declare dimming, against 54% that do not offer it. A dimmable LED ceiling light is then controlled from the wall switch or a remote control depending on the model.

Room	Recommended type	Temperature
Living room	Ceiling light or chandelier	2700 K
Dining room	Pendant above the table	2700 K
Kitchen	Surface-mounted ceiling light	3000 K
Bedroom	Diffused ceiling light	2700 K
Bathroom	IP44 ceiling light	3000 K

A ceiling light that stays out of the field of view when seated is installed lower than one might think. The same reasoning applies to a wall light: our guidelines for installation height also apply to a ceiling point in a low room.

If the room has