Table of Contents
For a wardrobe, start with the colour rendering index: look for CRI 90 or more, in warm white 3,000 K or neutral white 4,000 K. Allow around 600 lumens per square metre, then spread that light down the sides and along the hanging rail. One fitting in the middle of the ceiling is what leaves you guessing.
A badly lit wardrobe does not look dark. You notice it outside, when the jumper you took for navy turns out to be black, or when the grey trousers you matched indoors clash with the jacket in daylight. That is a lighting fault, not a storage fault. This guide starts with the part almost nobody measures, colour rendering and the shadows thrown across your shelves, then moves on to lumens, placement, the UK wiring rules and the options that need no wiring at all.
Why you pick the wrong colour in a wardrobe
Two faults explain nearly every bad surprise, and neither is cured by a brighter bulb.
The light does not contain the colour
White light is not automatically complete light. If deep red or blue is thin in the source, it will be thin on the fabric too: a colour cannot be reflected if it was never emitted. Two garments that look identical under your bedroom ceiling light separate cleanly in daylight. Colourists call this metamerism, and it is the single most useful idea in this guide.
Shadows across the shelves
A single point of light in the middle of the ceiling drops the shadow of every shelf onto whatever sits under it, and your own shadow onto the hanging rail as soon as you reach in. The bottom piles stay dark, and so does the back row of a deep cupboard. Your eye then reads a darkened, drained version of the colour and judges it wrong. One central point fails under a vaulted ceiling too, for the opposite reason, because it is simply too far from the floor: see our guide to vaulted ceiling lighting.
Greens and blues drift the most. A khaki turns brown under light that is too warm, a sage greys out under light that is too cool. Our guide to what colour goes with green shows how far that family moves depending on the source.
CRI, the number that decides whether you see the true colour
The colour rendering index, written CRI or Ra, compares how a source renders a set of test colours against a reference light: a glowing filament below 5,000 K, daylight above it. It is scored out of 100 and defined by the International Commission on Illumination, which averages eight moderate test colours.
| CRI | What you see in a wardrobe | Where you find it |
|---|---|---|
| 80 | Clear colours read fine, darks merge: navy against black, chocolate against bottle green | The market floor for most LED sources |
| 90 | Darks separate, beiges and greys keep their undertone | Our recommended figure for a wardrobe |
| 95 | Very close to daylight, worth it if you match fabrics or sew | The better integrated LED fittings |
Eighty is a floor, not a performance. The ecodesign rules for lighting products require at least 80 for most light sources sold in the UK, and the bulk of what is on sale is built to that number rather than above it. At 80, clear colours read fine but darks merge. In a wardrobe, where you judge a colour at arm’s length, we aim for 90.
Our advice: that average leaves out saturated red, which is measured separately as R9, so two sources both quoted at 90 can still render a red differently. On an integrated LED fitting the index is a property of the product and is printed on the spec sheet. On a fitting that takes a bulb, it belongs to the bulb you choose: our guide to LED bulbs shows where to read the figure on the box.
3,000 K or 4,000 K in a wardrobe
Colour temperature, in kelvins, says whether the light leans yellow or blue. It does not replace CRI: light can be perfectly neutral and still render colours badly. Read the two figures together.
| Colour temperature | Effect on clothes | In a wardrobe |
|---|---|---|
| 2,700 K | Yellows whites, flattens dark blues into black | Avoid it for choosing an outfit |
| 3,000 K | Warm, and faithful as soon as CRI reaches 90 | Our choice for a wardrobe open to the bedroom |
| 4,000 K | Neutral white, the best at separating dark shades | Our choice for a fitted wardrobe or a dressing room |
| 5,000 to 6,500 K | Blue cast, office feel, grey skin in the mirror | No |
The rule fits in one sentence: above 4,000 K you see accurately but the room turns clinical; at around 3,000 K with a CRI of 90 you see accurately and the room still feels like home. A walk-in wardrobe used at 7 am takes the neutral white well. A pair of doors on the bedroom wall, open in the evening, is better at 3,000 K.
The point most people miss: keep every source in the wardrobe at the same colour temperature. Two different whites side by side wreck any comparison between two garments, and the mismatch is obvious on a pale door front. The same clash turns up on a hall wall, which is never seen in daylight at all: see our guide to hallway colours.
How many lumens a wardrobe needs
BS EN 12464-1 sets 200 lux for changing rooms: a circulation level, where you get changed without matching anything. To judge a colour, we suggest 300 lux.
The method is the one in our guide to how many lumens you need: lumens to install = floor area × target lux × 2, the factor of two covering losses in the fitting and in the room surfaces. At 300 lux that works out at 600 lumens per square metre.
So a 2 m² cupboard with a rail wants roughly 1,200 lumens, a 4 m² wardrobe roughly 2,400, and a 6 m² dressing room roughly 3,600. Add 20 per cent if the doors and carcases are mid toned, 40 to 50 per cent if they are dark: an anthracite wardrobe swallows light, and so does a run of oak veneer. These totals are for the whole space and are shared between every source. They never come out of one fitting.
Where to put the light: ceiling, wall lights, rail and shelves
This is the other half of the problem. The right quantity of light, put in the wrong place, leaves exactly the same areas dark.
The ceiling fitting still does the base, as long as it is long
A round fitting in the centre of a dressing room lights the floor and leaves the shelves in shadow. A batten, run along the ceiling and set 30 to 40 cm out from the back wall so that it sits above the front edge of the shelves, lights the clothes from the front instead of skimming them from above. You will find those long formats in our dressing room ceiling lights.
Vertical wall lights, for the mirror and for you
A spotlight above a mirror digs out the shadows under your eyes and leaves your body dark. Two vertical sources, one each side of the glass, light your face and the front of the garment with no cast shadow at all: it is how a fitting room is lit. Centre them at eye level, around 1.6 to 1.7 m, roughly 70 cm apart. Our LED wall lights include the slim vertical and batten formats that suit this job.
The hanging rail and the shelves
Under a high shelf, a small batten or an LED strip light fixed at the front, behind a shallow lip, lights the rail without glaring in your eyes. At the front, not at the back: a strip stuck against the rear panel lights the panel, not the clothes. Three details separate a neat job from a visible one. Use an aluminium profile with an opal diffuser, or you see every diode reflected in the door glass. Check the strip’s CRI before you buy, because it is the figure most often left off a strip listing. And keep the strip at the same colour temperature as the ceiling fitting. For a shoe rack, small spots are enough, on the same two conditions.
Wiring, safety and what the UK rules ask
A wardrobe is a dry room, so IP20 is enough; there are no zones to respect as there are in a bathroom. The wiring rules still apply in full.
In the UK, fixed electrical work is done to BS 7671, the IET Wiring Regulations, which call for 30 mA RCD protection on lighting final circuits in a home. In England, Part P of the Building Regulations decides what has to be notified. Installing a new circuit for a dressing room, or replacing the consumer unit to add one, is notifiable work. Adding a light point to an existing lighting circuit in a wardrobe is not, but it must still meet BS 7671, and you should expect a Minor Electrical Installation Works Certificate for it. Notifiable work is for a registered electrician who belongs to a competent person scheme, such as NICEIC or NAPIT, and who certifies and registers the job; otherwise you have to tell building control before you start. Wales has similar rules, while Scotland and Northern Ireland have their own.
Two practical points from Electrical Safety First that matter in a cupboard full of fabric. Isolate at the consumer unit and prove the circuit is dead before you touch a fitting, not just at the switch. And leave clearance between any source and the nearest garment: LED runs far cooler than halogen, which is reason enough to leave halogen behind, but a driver still needs air around it. Our guide to motion sensor lights covers the switching side, which is where most wardrobe installations are decided.
Lighting a wardrobe with no wiring
Plenty of fitted wardrobes and under-stairs cupboards have no supply at all. Three answers, from the quickest to the most permanent.
- On batteries, with no cable at all. Rechargeable bars and pucks, magnetic or screwed, go up in ten minutes. Their limits are run time and, very often, an unstated CRI: read the spec, or you are back where you started. Our guide to battery operated wall lights compares the formats.
- Off an existing socket. An LED strip or a plug-in fitting needs no work beyond routing the flex tidily out of sight. Keep the transformer accessible: it is the part that fails first.
- Automatically. A PIR sensor or a door contact brings the wardrobe up as you open it and switches it off by itself. In a cupboard you only open twice a day, this is what makes a battery light practical rather than annoying, and it is why most ready-made wardrobe lights now come with a sensor built in.
If your cupboard is still lit by an old fluorescent batten that blinks before it strikes, the fault is often a part worth a couple of pounds. Our guide to testing a fluorescent starter lets you decide between repairing it and moving to LED, where the CRI is something you choose.
Frequently asked questions about wardrobe lighting
Which strip light is best for a wardrobe?
One with a stated CRI of 90 or more, at 3,000 K or 4,000 K, fitted in an aluminium profile with an opal diffuser. The profile hides the diodes and spreads the light; without it you see a row of dots reflected in the door glass. Length matters more than brightness: run it along the full front edge of the shelf or rail.
What are the regulations for light fittings in the UK?
Fixed wiring must meet BS 7671, the IET Wiring Regulations, which require 30 mA RCD protection on lighting final circuits in a home. In England, Part P of the Building Regulations makes a new circuit or a consumer unit replacement notifiable, so it is work for a registered electrician in a competent person scheme. Wales has similar rules, while Scotland and Northern Ireland have their own.
Is an LED strip or an LED bulb better in a wardrobe?
A strip for shelves and rails, because it lights a long, shallow surface evenly from the front. A bulb in a fitting for the room itself, where you need a single bright source. Most wardrobes work best with both, kept at the same colour temperature so garments do not change shade between the rail and the mirror.
Do wardrobe lights need a sensor?
In a cupboard you open and close, yes. A PIR sensor or a door contact switches the light on as the door opens and off afterwards, which is what makes a battery light practical rather than a chore. In a walk-in dressing room a wall switch by the door is usually better, because you stay in the room longer than a sensor timer runs.
What colour temperature should wardrobe lighting be?
Warm white 3,000 K for a wardrobe that opens onto a bedroom, neutral white 4,000 K for a fitted wardrobe or a separate dressing room, where it separates dark shades best. Avoid 2,700 K, which yellows whites, and anything above 5,000 K, which greys your skin in the mirror. Keep every source in the space on the same figure.
Can you fit a 240 V wardrobe light yourself?
Adding a light point to an existing lighting circuit in a wardrobe is not notifiable under Part P in England, so you may do it, but it must still comply with BS 7671 and be certified. A new circuit or any change at the consumer unit is notifiable and belongs to a registered electrician. Isolate at the consumer unit and prove the circuit is dead before you start.
Sources
- CIE 13.3-1995, Method of Measuring and Specifying Colour Rendering Properties of Light Sources (colour rendering index, eight test colours, R9 measured separately). International Commission on Illumination
- CIE S 017, ILV: International Lighting Vocabulary (metamerism, correlated colour temperature). International Commission on Illumination
- BS EN 12464-1, Light and lighting, Lighting of work places, Part 1: Indoor work places (200 lux in changing rooms). BSI
- The Ecodesign for Energy-Related Products and Energy Information (Lighting Products) Regulations 2021, S.I. 2021/1095, Schedule 3, Table 5 (minimum CRI 80 for most light sources, in force since 1 October 2021). legislation.gov.uk
- BS 7671, the IET Wiring Regulations (30 mA RCD protection for lighting final circuits in dwellings, IP20 in a dry room). IET and BSI
- Approved Document P, Electrical safety, dwellings, Building Regulations for England (notifiable work, competent person schemes, Minor Electrical Installation Works Certificate). GOV.UK
- Safe isolation and DIY electrical work at home (prove dead before working on a fitting). Electrical Safety First
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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
