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An off centre ceiling light is moved by leaving the wiring where it is and taking the fitting across: a hook screwed into the ceiling above the spot you want lit, the flex running out to it from the rose, then a vertical drop. Order the horizontal run plus the drop, fix the hook into something structural, and leave slack in the flex.
The rose sits in the middle of the room, the table is pushed up to the window, and nobody wants to chase a channel across the ceiling. Moving the fitting settles it in an hour, with nothing altered in the fixed wiring. Here are the figures: the flex to order, the fixing for your ceiling, the tension never to put in the cord, and what the offset costs in light on the table.
Why ceiling lights end up off centre
Almost never bad workmanship. The point was centred on the room as it stood the day it was set out, before anyone knew where the furniture would go. Then the room changed and the wiring did not: a wall comes down, an extension swallows the old back wall, a kitchen gains an island, a table moves to the window. In a Victorian terrace the rose often marks a room since knocked through. No regulation says a pendant belongs in the middle of a ceiling; it belongs over the surface it lights.
Three ways to move the pendant, not the wiring
The current keeps arriving where it already arrives and the fitting travels to the end of its flex, so every option below assumes a pendant on a cord. A flush fitting cannot move at all.
- Hook and flex. A hook screwed in above the table picks up the flex, which then drops straight down. The cheapest answer and the only one with real reach. The flex stays on show between rose and hook, which is its single drawback.
- A rail or a bar. A bar fixed to the existing plate carries heads that slide along it. The reach is limited to the bar, usually 30 to 50 cm, but nothing crosses the room and you drill nothing.
- A swing arm. It screws onto the existing point and pivots, from 50 cm to close to a metre, with no second fixing. In return it imposes its own look and takes little weight, often a kilo.
A fourth route: a spider pendant light, built to leave one rose and spread long cords to wherever you hook them. The diagonal stops being an accident and becomes the design.
How much flex to order
Work this out before you buy, not from the top of a stepladder.
Flex = the horizontal run from rose to hook + the drop + 15 cm for adjustment.
A common case. A 2.40 m ceiling, a 750 mm table, the rose 1.80 m from the centre of the table. The bottom of the shade should sit 60 cm above the top, so 1.35 m off the floor. If the fitting is 30 cm tall, the drop is 2.40 less 1.35 less 0.30, or 0.75 m. Total: 1.80 + 0.75 + 0.15 = 2.70 m of flex.
Hold that figure against the maximum height on the product page: an ordinary pendant runs to 100 or 150 cm, enough to drop but not to cross. A short flex cannot be rescued, so choose a long-cord model when you order. Fabric flex extends easily; a rigid rod does not. Under a sloping roof, where the drop alone often passes three metres, our guide to vaulted ceiling lighting works the sum through.
The 60 cm comes from licht.de, the German lighting information centre; our guide to dining room lights covers adjusting it for a deep shade. Where people walk underneath, keep 2.15 m of clear headroom below the fitting, the walking line we use across this blog.
The hook: which fixing for which ceiling
Once the pendant hangs at the end of its flex, the hook carries nearly all the weight and the rose only the connection. Size it on what the ceiling is made of.
| Ceiling | Fixing for the hook | Load to work to |
|---|---|---|
| Joist, or a timber batten | Screw hook driven straight into the timber | The safest of the lot; find the joist first |
| Plasterboard between joists | Metal expansion anchor, or a spring toggle | 3 to 10 kg per fixing, depending on the board |
| Lath and plaster | Nothing in the plaster; reach the joist above it | Treat old plaster as a finish, never a fixing |
| Concrete slab | Expansion anchor for solid material, then a screw hook | Whatever the anchor itself is rated for |
| Suspended ceiling tiles | Fix back to the structure above the grid | No load on the tiles |
The 15 kg or more printed on a pack of metal expansion anchors is a wall figure. Overhead, the weight pulls the anchor straight out of the board, and plasterboard makers quote far less: 3 to 10 kg per fixing, depending on the board thickness and on whether the fixing holds in the board alone or in a metal frame. Above 10 kg, the hook has to go through to a joist or the structure above. A dining pendant rarely passes three kilos, which already reaches the lowest of those figures, so aim for a joist whenever you can; an ordinary plastic plug simply spins in the void. Keep a margin, because people pull on a pendant to set its height far harder than it ever pulls on itself. Our guide to how to install a ceiling light covers isolating at the consumer unit. And run a detector before drilling: ceilings hide cables, and the floor above hides pipes.
Never pull the flex tight
This is the mistake almost everyone makes, and it shows at a glance. A cord stretched like a washing line pulls on the terminal block, works the cord grip out of the rose in the end, and gives the room the air of an extension lead. The reason is mechanical: the tighter a cord, the faster the force climbs. Over two metres, a flex that dips only 5 cm carries about five times its own weight, against 1.25 times if it dips 20 cm. Leave 10 to 15 cm of sag.
The other mistake is to drop the hook altogether and run the flex diagonally to the fitting. The shade then hangs out of true, its opening no longer faces the table, and the bulb comes into the direct view of everyone sitting down. The hook is what makes the drop vertical. On looks, commit either way: one clean line of black fabric reads as a drawing on a white ceiling, and several cords read as a pattern. And if you want to bring the light down at dessert, the bulbs have to allow it: our guide sets out the dimmable meaning and the three places to check. With a cane or slatted shade that vertical drop also sets the shadow pattern on the ceiling, which is where urban jungle interior design begins.
Where the light lands once you move it
This is the real reason to get the offset right, and nobody on this subject mentions it. Light falling on a surface drops with the square of the distance to the source, and drops again when it arrives at an angle. Both effects stack the moment the pendant leaves the vertical: the table does not lose a little light, it loses most of it.
In figures: an 800 lumen bulb in an open shade, 60 cm above the table top, gives around 350 lux directly beneath it. Move it 30 cm sideways and about 250 lux reach the centre of the table; at 60 cm, 125 lux; at a metre, under 50 lux, and the light is now on the back of a chair. To convert your own values, our guide to lux vs lumens sets out the formulas.
So a rough offset is worth nothing: aim at the centre of the table. And since the light concentrates under the fitting, a long table wants two or three drops rather than one large shade moved across. The same holds wherever light must land on a defined surface, a worktop, a desk, the rail in a wardrobe. Over an island the offset is usually combined with a bar, as on several of our kitchen pendant lights.
Then there is glare. A bare bulb moved out often lands in the eyeline of people sitting down, when it was clear of it in the middle of the room. The test takes ten seconds: hold the pendant at its future position, sit down and look at the person opposite. A bulb rather than a whole face means frosted glass. Over a worktop the tint matters as much as the position, and our guide to cool white vs warm white gives the kelvin figure to buy on.
Renting, ceilings you will not drill, and where the rules start
A tenant can drill and make good on the way out: a 6 mm hole disappears under filler. On a stretched ceiling, old lath and plaster or a suspended tile, better to open nothing. Three answers need no second fixing.
- A bar or rail on the existing plate. Everything fixes to the original point and the offset happens along the bar. It is the only arrangement that moves the wired light itself without drilling elsewhere.
- A swing arm. Same principle, adjustable, but light duty and strong on style.
- A plug-in pendant. One fitted with a plug hangs from something already there, a shelf, a beam or a pole. Our guide to battery operated wall lights covers that route and its limits.
Adhesive hooks are often put forward as the tenant’s answer. Their rated load is low, it falls with heat and with time, and a fitting hangs there day and night: keep them for guiding the flex, never for the point that carries it.
None of this is notifiable work. Fixed wiring at home is done to BS 7671, the IET Wiring Regulations, which call for 30 mA RCD protection on lighting final circuits. In England, Part P of the Building Regulations makes a new circuit, a consumer unit replacement and any change to a circuit in the zones around a bath or shower notifiable, and that work goes to a registered electrician in a competent person scheme such as NICEIC or NAPIT. Wales has similar rules, while Scotland and Northern Ireland have their own. Changing the fitting on an existing point is not notifiable, though it must still meet BS 7671. Moving the point itself crosses that line, and Electrical Safety First advises getting an electrician in whenever you are unsure.
Frequently asked questions about an off centre ceiling light
Why are ceiling lights off centre?
Because the point was centred on the room as it stood when the house was wired, not on the furniture. Rooms knocked through, rear extensions and a table pushed to the window all move the furniture without moving the rose.
What is the best solution for an off centre ceiling light?
A hook screwed in above the spot you want lit, with the flex running out to it from the rose and then dropping vertically. It costs very little and is the only answer with a reach of more than half a metre.
What is the rule for ceiling lights?
There is no rule about centring. The one that counts is height: about 60 cm between the table top and the bottom of the shade, and 2.15 m of clear headroom where people walk underneath, the walking line we use across this blog.
Can I move a ceiling light myself?
You can move the fitting. Changing a light on an existing point, with the power off at the consumer unit, is not notifiable under Part P in England, though it must still meet BS 7671. Moving the point itself is another matter.
How do you fill the gap between a light fitting and the ceiling?
With a pattress, a timber or plastic ring screwed to the ceiling behind the fitting, which takes up an uneven or artexed surface. When a pendant moves to a hook, the old rose stays in place and stays live: tidy it with a slim cover.
How far can you move a pendant from its ceiling rose?
As far as the flex and the hook allow. Spider pendants carry cords of up to three metres each; an ordinary pendant quotes 100 to 150 cm and will not cross a room. Check the maximum height before ordering.
Sources
- Dining room lighting: the bottom of a pendant about 60 cm above the table top. licht.de
- BS 7671, the IET Wiring Regulations: 30 mA RCD protection on lighting final circuits in dwellings. BSI and the IET
- Approved Document P, Building Regulations for England: which electrical work in a dwelling is notifiable. GOV.UK
- Electrical work at home and when to use a registered electrician. Electrical Safety First
- BS EN 12464-1, lighting of indoor work places: illuminance is measured on the task surface, not at the lamp. BSI
- Fixings into a plasterboard ceiling: 3 to 10 kg per fixing depending on the board and the frame, heavier loads into the structure. Plasterboard manufacturers’ fixing guidance, Gyproc and Placo, Saint-Gobain
Related products
See also
Mood Lighting: The Three Settings That Really Create It, Room by Room
How to Change a Spotlight Bulb, Even With No Clip or Spring
Conservatory Lighting: Fixings, Lumens and the Black Mirror After Dark
