To plan a lighting layout, work in three layers — ambient, task and accent — then place fixtures by what each layer has to do rather than by spacing them evenly across the ceiling. Group the switching so each layer can be controlled on its own, keep one color temperature through the house, and draw all of it on paper before a single fixture is bought.
This is general design-planning information. The figures below are common design practice, not code requirements. Building codes govern what is permitted, codes vary by jurisdiction, and all electrical work, including fixture locations, circuits, switching and ventilation fans, is work for licensed trades and your local building authority to confirm and carry out under the required permits.
Plan a Lighting Layout in Three Layers
Almost every badly lit room has the same cause: one fixture in the middle of the ceiling doing all three jobs at once. Three layers fixes it.
Ambient light is the general fill that lets you walk through a room and see its shape. It comes from recessed downlights, a ceiling fixture, cove lighting or light bounced off a ceiling. Its job is evenness, not drama.
Task light is aimed at a surface where something happens: a counter, a desk, a sink, a reading chair, a stair tread. It has to reach the work without your own body shadowing it, which is why task light comes from in front of or above the front of the work, never from behind you.
Accent light is the layer that makes a room look designed instead of lit. It picks out texture, a plant, shelving or the inside of a glass cabinet. It is also the most commonly skipped layer, and the one people notice as "nice lighting" without being able to name it.
Go room by room and write the three layers down before you place anything.
Spacing and Placement, Room by Room
Placement follows the work. Even spacing across a ceiling is the default people fall back on when nobody decided what the light was for, and it reliably lights the floor and the tops of heads while leaving counters and walls dim.
Kitchens
Put task light directly over the front edge of the counter, not centered on the cabinet, so the beam lands on the work and not on the cabinet doors. Under-cabinet light is the most useful lighting in a kitchen and the easiest to forget while the walls are still open. Over an island, space pendants or downlights to the island's length rather than the room's grid, keeping the outer fixtures in from the ends so the composition reads centered.
Bathrooms
Light the face from both sides of the mirror at roughly eye level, which gives even light across the face. A single downlight above a mirror casts shadows into the eyes and under the chin. Keep a separate ambient source for the room and treat any light near a tub or shower as a specification question for a licensed electrician.
Living and dining rooms
Ambient light here should be low-contrast, and in a living room most of it can come from lamps rather than the ceiling. Over a dining table, hang the fixture centered on the table, not the room, with the bottom commonly 30 to 36 inches above the tabletop.
Bedrooms
Reading light at each side of the bed, switched from the bed, is the whole job. A bright central fixture that can only be switched at the door is the most common bedroom lighting mistake. Keep closet light and general room light on separate controls.
Hallways and stairs
Spacing here is about continuity and safety: no long dark stretch, and no fixture positioned so it throws a shadow across a stair tread. Light the treads, not the ceiling above them.
One placement rule runs across all of these: a downlight set close to a wall will scallop and emphasize that wall, and set further out will light the floor. For general fill with standard ceilings, roughly 4 to 6 feet apart and 2 to 3 feet off the wall is a common starting grid, adjusted around the task and accent positions.
Switching and Dimming Groups
Switching is where most lighting plans quietly fail. The fixtures get installed correctly and then every light in the room turns on with one switch, which collapses three layers back into one.
Group fixtures by layer and by use, not by which wall they happen to sit on:
- Ambient on its own control, dimmable, so the room can run bright for cleaning and low for the evening.
- Task on its own control, usually local to where the task happens — under-cabinet light switched at the counter, reading light switched at the bed.
- Accent on its own control, so it can be the only layer on.
- Three-way switching at both ends of any room, hallway or stair with two entrances, so nobody walks through the dark to reach a switch.
- Exterior and entry light separated from interior groups.
Then plan dimming deliberately. Not every fixture dims the same way, and the control has to match what it controls — a specification question for the electrician before purchase, not after.
Mark every switch position on the plan and walk the route in your head: front door to kitchen, bedroom to bathroom, top of stairs to bottom. Each leg should have a switch where your hand naturally lands.
Keep the Color Temperature Consistent
Color temperature is the warmth or coolness of the light, expressed in Kelvin. Mixing temperatures within sight of each other is what makes a house look patched together, and it is entirely avoidable at the planning stage.
| Range | Reads as | Commonly used for |
|---|---|---|
| 2200K to 2400K | Very warm, candle-like | Accent and decorative fixtures only |
| 2700K | Warm, soft | Living rooms, bedrooms, dining, hallways |
| 3000K | Warm neutral | Kitchens, bathrooms, laundry, workshops |
| 3500K to 4000K | Neutral to cool | Garages and utility spaces |
| 5000K and above | Cool, daylight-like | Rarely appropriate in living spaces |
Pick one temperature for the main living areas and hold it everywhere those areas are visible from each other. A 2700K living room opening onto a 4000K kitchen looks wrong from the first glance, even to someone who has never thought about lighting.
Two specification notes belong on the plan as well. Color rendering matters as much as temperature for how surfaces and skin look, so specify a high rendering index house-wide rather than only in the kitchen. And confirm that dimmable fixtures hold their color as they dim.
Plan a Lighting Layout on Paper First
A lighting plan is a drawing, and drawing it is the cheap part. Take the floor plan you already have and build the lighting over it.
- Draw each room's furniture layout first. Lighting positions depend on where the bed, the island, the sofa and the desk actually land.
- Mark every task surface with a hatched box. These get light first.
- Place the task fixtures, then the accent fixtures, then fill in ambient only where the first two leave the room uneven.
- Draw the switch positions at every doorway and at every point where someone would reach for a control.
- Letter the switch groups — A, B, C — and write which fixtures belong to each.
- Note the color temperature and whether each group dims, fixture by fixture.
- Walk the plan room by room, in order, as if it were evening, and check that every move you make has light.
Then hand that drawing to the licensed electrician doing the work, well before walls close. A lighting layout decided after drywall is a lighting layout decided by where the wiring already runs.
Common Lighting Layout Mistakes
- An even ceiling grid with no reference to the furniture below it.
- Downlights centered over counters, so light hits cabinet doors instead of the work surface.
- A single switch controlling every fixture in a room, and nothing dimmable anywhere.
- Mixed color temperatures visible from one room to the next.
- No light on the walls, leaving bright floors and dark edges.
- A pendant hung over where the table used to be rather than where it will be.
- Switch positions that force someone to cross a dark room.
Lighting is one of the few parts of a house that is almost free to get right on paper and expensive to fix afterward. Decide the layers, place the fixtures by what they light, group the switching, hold one color temperature, and draw the whole thing before anything is ordered. For lighting planning worksheets and room-by-room checklists, see the Free Resources page.