Checklists · Bathroom
Bathroom Lighting Discussion Preparation Checklist
Helps you describe how light behaves in your bathroom now, decide what each part of the room has to do at different times, and take the electrical questions to someone qualified.
7 sections · 42 planning prompts · educational owner-side preparation
https://www.builddesignhub.com/checklists/bathroom-planning/bathroom-lighting-discussion-preparation · Build Design Hub — educational planning resource. Requirements vary by project and location.
Scope
What this checklist covers
The preparation ground these prompts walk through.
- How the room is used at different times, from early mornings to a visit late at night
- Light at the mirror, shadows on faces, and the tasks people take elsewhere because of it
- The ceiling fitting, the shower area and how fittings are reached afterwards
- Switching, dimming and whether a visitor could work the room out unaided
- Daylight, glazing and how the colour of light changes the finishes you chose
Audience
Who this checklist is for
- Owners planning a bathroom refit where the ceiling or walls will be opened
- Households where someone shaves, applies make-up or wears lenses in this room
- Anyone preparing a lighting conversation with a designer or a qualified electrician
- Owners who find the room gloomy or unflattering but cannot say precisely why
Timing
When to use it
- Recording how light behaves in the room before anything is stripped out
- Working out what each part of the room needs to do at different times
- Preparing electrical questions for a qualified electrician rather than guessing
- Deciding switching and dimming preferences before first fix begins
- Checking finish samples under the light they will actually live under
Limits
When it is not sufficient
This is general planning preparation. These situations need a qualified professional, and often the relevant authority.
- Deciding what may be positioned where in a bathroom, which is governed by local requirements
- Selecting fittings, which depends on the room, the ceiling and a qualified electrician
- Any judgement about wiring, protection or the condition of an existing installation
- Establishing what your ceiling can accommodate, which needs someone able to look inside it
The checklist
Work through the sections
Tick the boxes on paper or on screen — nothing is stored, so print the page if you want to keep your marks.
1.How the room is used at different times
Bathroom lighting is asked to do several unrelated jobs. List those jobs before anyone starts talking about fittings.
List every task carried out in this room, including shaving, applying make-up, handling lenses, bathing a child and cleaning the room itself.
Each task wants light from a different direction, and a list of tasks is a far better brief than a request for brighter lighting.
Note who uses the bathroom in the middle of the night, what they need to see, and whether full brightness would wake them properly.
Night use is the situation people complain about most and mention least, and it usually needs its own answer rather than a dimmer setting.
Note whether someone gets ready while others sleep, and whether light escaping around the door has ever been a complaint.
Light spilling into a hallway is a genuine household issue that is settled by switching arrangements and door choices rather than by fittings.
Note whether people dress, dry hair or spend time in the room beyond bathing, since that changes how the space needs to be lit.
A room used only for washing needs less than one where somebody gets ready completely, and the difference is rarely stated.
Note the times when the room feels gloomy, and whether that is a dull afternoon, a winter morning or simply the evening.
Identifying when the problem occurs points towards whether it is a daylight issue or a fittings issue, which are solved differently.
Note whether anybody reads or relaxes in the bath, and what light they currently use to do it.
Bath use is the one situation where people want less light rather than more, and it argues for separate control rather than a single setting.
2.Light at the mirror and how faces are lit
Almost every complaint about bathroom lighting is really a complaint about the mirror. These prompts isolate that problem.
Stand at the mirror and note where the light on your face comes from, and whether shadows fall under your eyes, nose and chin.
Light arriving only from above produces exactly those shadows, which is why an otherwise bright room can still be useless at the mirror.
Note whether anybody takes shaving, make-up or lens handling to another room or to a window, and ask them why they do it.
This is the strongest evidence you can gather, because it identifies a failure the household has already worked around silently.
Consider whether light could reach the face from both sides rather than only from above, and note what would have to be on that wall.
Side lighting changes the mirror completely, but it competes with cabinets and tiling, so the trade needs raising before the wall is filled.
Note whether any current fitting is reflected in the mirror as a bright spot, and whether it is uncomfortable to look at.
Mirrors reflect fittings straight back at the person using them, which is a positioning issue rather than a matter of brightness.
Consider whether you want a mirror with lighting built into it, and ask what that would need behind the wall where it sits.
Lit mirrors resolve the shadow problem neatly but need provision made before the wall is finished, which is easy to miss.
Anything requiring a connection near a basin must be settled by a qualified electrician working to the requirements that apply where you live.
Note the range of heights of the people using the mirror, and whether the tallest and shortest can both see themselves properly.
Mirror height and light position are decided together, and households with a wide range of heights need this said out loud.
3.The ceiling fitting, shadows and the shower
A single fitting in the middle of the ceiling puts your own body between the light and whatever you are doing. Notice where that happens.
Move around the room and note where your own shadow falls on what you are trying to see, particularly at the basin and in the shower.
This is the simplest test there is and it explains most of the frustration with a centrally lit bathroom.
Note how much light actually reaches inside the shower or over the bath, especially once a screen or curtain is in place.
Enclosures cut light considerably, and the shower often ends up the darkest part of a room that was measured as a whole.
Ask a qualified electrician what may be positioned above the shower or bath in a room of this kind, and record what you are told.
This is the question owners most often try to answer for themselves from images, which is exactly where it should not be answered.
Positioning of fittings in relation to water is governed by requirements that vary locally and must be confirmed by a qualified electrician.
Ask what the ceiling is built from and whether it can accommodate recessed fittings, then record the answer rather than assuming.
Recessed fittings need something behind the ceiling to sit in, and that is not always available in the way people expect.
Ask how each fitting is reached for cleaning or for changing a lamp, and whether that means standing on something in a wet room.
Fittings above a bath are the hardest to reach and the ones most likely to be left dirty or unlit for a long time.
How a fitting may be opened, cleaned or relamped is answered by the manufacturer guidance and a qualified electrician, not by household improvisation.
Consider whether the room needs more than one light position, and note which parts of the room are currently left in shadow.
Adding positions is straightforward while the ceiling is open and disruptive afterwards, which makes this a conversation for now.
4.Switching, dimming and the visit at night
How light is controlled matters more day to day than which fittings were chosen. These are decisions to make before first fix.
Note where you reach for the switch when entering, whether that is inside or outside the room, and whether it suits everybody.
Switch position is decided by habit and by local requirements, and stating your preference early is the only way it gets considered.
Ask a qualified electrician what switching arrangements are appropriate for a bathroom where you live, and note the answer with the date.
This varies more than owners expect, and it is much easier to ask than to guess from what another home happens to have.
Switch types and positions in bathrooms are governed by local requirements and must be settled by a qualified electrician, never assumed.
Decide whether the mirror light and the ceiling light should be controlled separately, and note when you would use one without the other.
Separate control is the simplest way to make a bathroom feel considered, and it has to be decided before the wiring is arranged.
Decide whether you want light levels to be adjustable, and ask whether the fittings under consideration can be controlled that way.
Not every fitting can be dimmed, and the combination of fitting and control has to work together, which is a question rather than an assumption.
Consider whether a low-level light for night use would be welcome, and note where it would need to be to be useful.
A gentle light for night use is one of the details people appreciate most, and it is almost never asked for because nobody thinks of it in daylight.
Note which switch people reach for when their hands are full, carrying laundry or a child, and whether it can be worked without a free hand.
Bathroom switches are used by people carrying things or with wet hands, which is a very different test from how they are chosen on a plan.
5.Daylight, glazing and being overlooked
Daylight is the light the room has for free. Record how much arrives, when, and what the household does to block it.
Note roughly which direction the window faces and at what part of the day direct light reaches into the room.
Knowing when daylight arrives explains whether the gloom complaint is about mornings, afternoons or the artificial lighting itself.
Note whether the glazing is obscured or textured, and how much that softens or reduces the daylight reaching the room.
Obscured glazing changes both quantity and quality of daylight, which affects how much artificial light the room needs during the day.
Note whether a blind or covering is used, whether it is ever opened, and whether privacy is the reason it stays closed.
A window permanently covered for privacy is effectively a wall, and treating it honestly changes the lighting conversation.
Check whether anything in the proposed layout, such as a screen or tall unit, would stand between the window and the rest of the room.
Daylight is easily blocked by furniture chosen for storage reasons, and the loss is rarely noticed until the room is finished.
Note whether the room has a rooflight or receives light borrowed from another space, and how reliable that light actually is.
Borrowed light varies with what happens in the other room, which makes it pleasant but not something to depend on.
Note whether the artificial light is switched on during the day, and in which part of the room that happens first.
The corner where the light goes on at midday tells you where the daylight is not reaching, which is precise and useful information.
6.The colour of light and how finishes read
Finishes are chosen under one light and lived with under another. This is where the disappointment usually comes from.
Decide whether the household prefers a warmer or cooler quality of light in this room, and write that preference down.
Stating the preference plainly avoids inheriting whatever the fitting happened to come with, which is how most rooms end up as they are.
Ask whether every fitting in the room will produce light of the same quality, including a lit mirror and anything inside a cabinet.
Mixed light quality within one small room is visible and unsettling, and it usually happens because items were chosen separately.
Take tile, paint and surface samples into the room itself and look at them at different times rather than judging them in a showroom.
Showroom lighting is chosen to flatter, and a finish that looked warm there can read quite differently in an obscured-glazed bathroom.
Note whether the surfaces you like are matt or reflective, and consider how each would behave with the light positions being discussed.
Reflective surfaces bounce light around a small room and also show every fitting reflected back, which cuts both ways.
If you are drawn to darker finishes, note what that would mean for how much light the room needs and raise it while both are still open.
Colour and lighting decisions are made by different people at different moments, which is exactly why they end up mismatched.
Write down the lighting quality you agreed, so the same decision is applied to fittings chosen later in the work.
Later purchases are made under time pressure, and a written note is what keeps them consistent with everything already decided.
7.Marking out positions and keeping the records
Lighting becomes fixed the moment the ceiling is boarded and the walls are tiled. These are the points to resolve first.
Ask to see the intended positions marked on the ceiling and walls before anything is fixed, and stand in the room to judge them.
Positions look different in the room than on a plan, and marking them out is a small request that prevents a permanent regret.
Check that the light positions relate correctly to where the mirror, cabinet and basin will actually be, not where they are now.
Fittings are frequently set out against the old arrangement because that is what is visible on site at the time.
Ask what provision could be made now for a lit mirror, a cabinet light or a shaver point, even if none of them is wanted at this stage.
Provision left in place while the ceiling is open is simple, whereas adding it afterwards means opening a finished surface again.
Write down which control operates which fitting once the work is complete, and keep that note with the rest of your records.
This is obvious on the day and forgotten soon afterwards, particularly if anybody else ever lives in or works on the home.
Ask for photographs of the wiring positions before the ceiling is boarded and the walls are tiled, and keep them safely.
Knowing where cables run is what prevents somebody drilling into one later, and taking the photographs is trivial at the right moment.
Keep the information about which lamps the fittings take, so replacements match what was originally chosen.
Mismatched replacements are the most common way a carefully considered lighting arrangement drifts apart over time.
Preparation
Documents and information to gather
Having these to hand usually makes the first conversation shorter and more useful.
- Notes on which tasks are carried out in the room and which ones people take elsewhere
- Photographs of the room taken at different times, including after dark with the current lighting on
- A sketch showing the window position, the mirror position and where people stand for each task
- Tile, paint and surface samples brought into the room itself for viewing
- Any information you hold about the existing electrical arrangement in the room
- Your written note of switching, dimming and light quality preferences
Records
Decisions to record before work begins
Write these down in your own words, with the date, so everyone is working from the same version.
- Whether light needs to reach faces from the sides as well as from above
- Whether the mirror light and ceiling light are controlled separately
- Whether a low-level option for night use is wanted, and roughly where
- The quality of light the household prefers, applied consistently across all fittings
- Whether light levels need to be adjustable, subject to what the fittings allow
- That you will be shown the marked-out positions before anything is fixed
Professional review
Questions to discuss with qualified professionals
Bring these to the relevant qualified professional, supplier or authority. Requirements vary by project and location.
- What may be positioned above the shower or bath in a room of this kind where I live?
- What switching arrangements apply to bathrooms here, and where can the control sit?
- Can this ceiling accommodate recessed fittings, and what is behind it?
- Can the fittings we are considering have their light level adjusted, and with what control?
- What provision would you make now for anything I might want to add later?
- How would each fitting be reached for cleaning or for changing a lamp?
- Would you mark out the positions so I can look at them in the room before they are fixed?
- What photographs will I receive of the wiring positions before everything is covered?
Blind spots
Commonly overlooked items
- Shadows under the eyes from a light that only comes from above
- The shower turning into the darkest part of the room once the screen is in
- Somebody in the household already doing close-up tasks in another room
- A fitting reflected as a bright spot in the mirror
- How anybody reaches the fitting above the bath to clean it
- Light escaping around the door when someone gets ready early
- Finishes chosen under warm showroom light and lived with under a much cooler fitting
What this checklist does not do
- This checklist prepares a lighting conversation only; nothing here indicates what may be positioned where in a bathroom.
- Every electrical question raised here belongs with a qualified electrician working to the requirements that apply in your location.
- Whether a ceiling can take recessed fittings depends on what is behind it, which needs someone able to look rather than an assumption.
- Your impressions of glare, shadow and gloom are worth reporting, but they are not a measurement of anything and should be described as impressions.
More preparation
Related checklists
Inspiration
Related Ideas Library pages
Design directions to explore once the preparation is done.
Go deeper
Related Build Design Hub guides
Explanatory planning guidance behind the decisions on this page.
Bathroom Planning Checklists
Bathroom preparation checklists — fixture and layout decisions to discuss, moisture and ventilation questions to raise, and information to gather before professional review.
Browse all Bathroom Planning checklists →