Bathroom lighting is one of the most overlooked parts of a home, and one of the easiest to get wrong. It has to do two very different jobs at once. In the morning it needs to be bright and accurate enough to shave, apply makeup or check how you actually look before you leave the house. In the evening it needs to do the opposite, dropping away to something soft and calm that helps you unwind in the bath.
A single ceiling fitting cannot do both. The bathroom lighting tips below come from the schemes our design team works on every week, and they apply whether you are planning a large family bathroom, a compact en suite or a downstairs cloakroom.
Start With IP Ratings and Bathroom Zones
Before you choose a single fitting, work out where it is going. UK bathrooms are divided into zones, and each zone sets a minimum level of protection against water ingress.
- Zone 0 is inside the bath or the shower tray itself. Anything here has to be fully immersion rated and run at low voltage.
- Zone 1 covers the area directly above the bath or shower up to 2.25m from the floor. Fittings here need protection against water spray as a minimum, and a higher rating is sensible if the space gets a lot of use.
- Zone 2 extends 600mm beyond zone 1, and takes in the area around a basin. Splash protection is the minimum here too.
- Outside the zones the rules relax, but bathrooms are humid rooms and a sealed fitting will simply last longer.
Regulations are updated periodically and the detail matters, so always have a qualified electrician confirm what is required for your specific layout. Getting this right at the planning stage is far cheaper than discovering a fitting is unsuitable once the ceiling is closed up.
Layer the Light Instead of Relying on One Fitting
The most common mistake we see is a bathroom lit by a single central downlight or a flush ceiling fitting. It puts light on top of your head, casts shadows down your face and flattens the whole room.
A good scheme uses three layers:
Ambient light fills the room and lets you move around safely. Recessed downlights positioned close to the walls work well here, because the light bounces off the wall surface and spreads back into the room rather than dropping in hard pools.
Task light is aimed at the things you actually do. In a bathroom this is almost entirely about the mirror.
Accent and feature light is what makes the room feel considered rather than functional. Think a niche in the shower wall, LED tape under a floating vanity, or discreet uplights behind a freestanding bath.
You do not need all three switched on at once. That is rather the point.
Get the Mirror Lighting Right
If you only spend money on one thing, spend it here. Lighting from above the mirror throws shadows into the eye sockets and under the chin, which is exactly where you need to see.
The best result comes from diffused fittings on either side of the mirror at roughly face height, so light arrives evenly from both sides. A mirror with integrated side lighting achieves the same thing in a single unit and is often the neatest solution in a small space.
Backlit mirrors have become very popular and they do look lovely, but be clear about what they are. The glow sits behind the glass and washes the wall, so it reads as a feature rather than a working light. If you choose one, add a separate task light for grooming.
Pay Attention to Colour Temperature and Colour Rendering
Colour temperature changes how a bathroom feels and how you see yourself in it.
Around 2700K to 3000K gives a warm, restful light that suits ambient and feature layers, and it is the right choice if the bathroom doubles as somewhere to relax.
Nearer 4000K is cooler and closer to daylight, which is why it works so much better at the mirror. Makeup applied under very warm light rarely looks the same once you step outside.
Colour rendering matters just as much and is far less talked about. A high CRI fitting, ideally 90 or above, renders skin tones accurately. Cheap fittings with poor colour rendering are the reason some bathrooms make everyone look slightly unwell.
Whatever you choose, keep it consistent within each layer. Mixing colour temperatures across the same set of downlights is immediately noticeable.
Dim Everything You Reasonably Can
A bathroom that can only be fully on or fully off is a bathroom with one mood. Putting the ambient layer on a dimmer, and separating the mirror light onto its own circuit, transforms how usable the room is.
Make sure the dimmer and the driver are genuinely compatible before installation. Flicker, buzz and a limited dimming range almost always come down to a mismatch between the two rather than a fault in the fitting itself.
For larger bathrooms, a simple lighting control system lets you set scenes: bright for the morning, low for a bath, minimal for the middle of the night. One button press, no fiddling with several switches while wet.
Solve the Night Time Problem
This is one of our favourite bathroom lighting tips because it costs very little and people notice it immediately.
Our Faltu micro floorwasher has been nicknamed the “pee light” by our design team, and there is a good reason almost every project we complete has at least one in the bathroom. Set low on the wall, wired to a PIR sensor and programmed to come on only at night, it gives you just enough light to see where you are going without the shock of full brightness at three in the morning.
It also means nobody wakes up the rest of the house by turning on the main lights.
Work With Awkward Ceilings and Small Spaces
Bathrooms are frequently the smallest room in the house, often with a sloped ceiling or a boxed in section hiding pipework.
On a sloped ceiling, use adjustable spotlights rather than fixed downlights. A fixed downlight in a slope aims light at an angle you almost never want, whereas an adjustable fitting lets you point it at a wall or a feature deliberately.
In genuinely tight spaces, look at micro fittings. Our Wasat cube shaped wall light is one we specify regularly in showers and above baths. It is small enough to disappear when switched off, comes in satin nickel so it sits comfortably with most schemes, and adds a pretty effect as well as useful light.
Light Your Storage
Nobody wants to hunt through half empty shampoo bottles in a dim shower. A recessed niche in the shower or bath wall gives you tidy storage, and a tiny downlight or a run of LED tape inside it turns that storage into a feature.
The same idea works for open shelving, mirrored cabinets and the underside of a vanity unit. Small, low output fittings are all you need. The aim is a soft glow that defines the shape of the joinery, not a spotlight on your toiletries.
Never Put a Downlight Over a Shower Head
This is the Lightmaster top tip, and it is the one people thank us for most often.
A downlight directly above a metal shower head reflects a hard ring of light onto the ceiling and drops a shadow straight down onto the floor. Unless it is perfectly centred, and it rarely is, it looks awful.
Instead, position small downlights close to the walls of the shower enclosure. The light bounces off the tiling, fills the space evenly and lifts the whole room rather than fighting with the fittings.
Common Bathroom Lighting Mistakes to Avoid
- One central fitting doing the work of three layers
- Task lighting placed above the mirror rather than beside it
- Mixing colour temperatures across the same layer
- Downlights spaced in a rigid grid with no relationship to the fittings below
- Choosing a dimmer after the fittings have already been bought
- Ignoring the ceiling void depth before specifying recessed fittings
- No provision for low level light at night
Frequently Asked Questions
How many downlights does a bathroom need?
Fewer than most people install. Spacing depends on ceiling height, beam angle and output, but positioning matters more than quantity. Light placed close to walls does far more work than the same fitting in the middle of the room.
What IP rating do I need in a bathroom?
It depends entirely on the zone the fitting sits in. Splash protection is the minimum in the areas around a bath, shower and basin, with a higher rating required inside the bath or shower itself. Ask your electrician to confirm against current regulations for your layout.
Should bathroom lighting be warm or cool white?
Both, ideally on separate circuits. Warm white for ambient and feature lighting, cooler and closer to daylight at the mirror where you need accurate colour.
Can you dim bathroom lights?
Yes, provided the fittings are dimmable and matched to a compatible dimmer or control system. Confirm compatibility before anything is installed.
Is LED tape suitable for a bathroom?
It is, as long as the tape and its driver carry a suitable rating for the zone and the driver is housed somewhere accessible and dry. It is ideal for niches, shelving and under vanity lighting.
Planning a Bathroom Lighting Scheme
Good bathroom lighting is not about buying expensive fittings. It is about deciding what the room needs to do at different times of day, then choosing and positioning fittings that deliver it quietly.
If you would like to talk through lighting design for your bathroom or a wider project, get in touch and we will be happy to help.
