Recessed lighting spacing: how far apart should downlights be?

Recessed downlights remain the default finish for Australian renovations because they disappear neatly into the low, wide ceilings common in brick veneer terraces across Sydney and Melbourne, and into the taller Queenslander-style block homes around Brisbane. The fittings are simple to buy; the layout is what decides whether a room ends up calm and evenly lit or blotchy and over-bright.

There is a persistent habit online of copying imperial spacing advice into metric without checking whether it suits local ceiling heights and room sizes. Australian ceilings in newer homes generally sit between 2.4 m and 2.7 m, while older fibro cottages and renovated Queenslanders can reach 3 m or more, so a single rule imported from a North American blog is rarely right for an average Aussie living room.

This guide works through a defensible spacing method, then applies it room by room — living areas, kitchens, bathrooms, bedrooms and covered outdoor space. It also covers the details that trip up first-time DIYers: insulation clearance, RCD protection, wet-area ratings, and how to mark a layout on the ceiling before a single hole is drilled.

Whether you are refreshing a rental in Parramatta, planning a renovation in Geelong or wiring a new alfresco in Adelaide, the goal is a layout you can defend to an electrician and, more importantly, one that still looks right at nine o'clock on a winter evening.

The spacing rule that works with Australian ceilings

The most reliable starting point is a ratio rather than a fixed number. Take the ceiling height in metres, halve it, and use that figure as the centre-to-centre distance between downlights. A 2.7 m ceiling gives roughly 1.35 m spacing, a 2.4 m ceiling gives around 1.2 m, and a 3 m ceiling can carry 1.5 m centres. The rule works because it approximates how far light spreads from a recessed fitting before it thins out.

That figure handles general ambient lighting — the base layer that keeps a room usable. Task and accent lighting deliberately breaks it. Over a kitchen bench you want 500–600 mm centres so the work surface is evenly lit without shadows, and around a bathroom vanity you can tighten to 600–900 mm.

Tall ceilings throw light further, so they tolerate wider spacing and fewer fittings. Low ceilings need the opposite: in a 1970s fibro cottage with 2.1 m ceilings, 1.0–1.2 m centres keeps the corners from going murky. Where a room has a dark focal wall, moving one fitting 100–150 mm closer to that wall often reads better than adding another light.

Room-by-room spacing for Australian floor plans

In living and family rooms, work between 1.2 m and 1.5 m centres, and keep the outer fittings 300–600 mm off the walls. Sitting lights too close to a wall creates a scalloped wash that looks dated, so push them in and let the beams overlap slightly. In an open-plan space flowing from lounge to dining, keep the same density across the whole ceiling plane rather than switching mid-room.

Kitchens usually run two layers. Ambient downlights at 1.2–1.5 m centres cover the floor and cabinetry, and a tighter row at 500–600 mm centres handles the bench, island or cooktop. Many renovators skip ceiling fittings over the bench entirely and use under-cabinet strips instead, which costs less and removes the shadow a downlight throws when you stand at the sink. Avoid placing a fitting directly in front of a splashback, since it flattens the tile finish and highlights every uneven edge.

Bathrooms and ensuites take 600–900 mm centres with wet-area rated fittings. Bedrooms are more forgiving: 1.5–1.8 m centres give a softer, more restful spread, and wardrobes are better served by a dedicated strip or a pair of narrow spotlights than by extra ceiling cans. Garages and carports sit at the wider end again, around 1.5–1.8 m, with higher lumen output and a motion sensor if the space is not used daily.

Entry areas deserve their own note. A downlight over the front door is often the only light a visitor sees, and a brighter, well-aimed fitting there changes how a house reads from the street. Pairing that with our picks for front door security cameras covers the approach as well as the doorway.

Ceiling height, insulation and Australian electrical rules

Australian installation rules matter more here than in most markets. Under the AS/NZS 3000 wiring rules, a recessed luminaire must either be marked IC for insulation contact or be installed with a clearance gap around it — commonly 50 mm — from any thermal insulation, and must not be a heat lamp or halogen type in that position. Modern LED downlights sold through Australian electrical wholesalers are usually IC-rated, but the box and the datasheet are the only reliable check.

Bathrooms add another layer. AS/NZS 2052 sets out zones where fittings need at least IPX4, and IPX5 or IP65 where water is likely to be sprayed directly, such as over a shower or an open shower screen. Those zones also demand RCD protection, and residual current devices on bathroom and kitchen circuits are standard practice across Australia.

Then there is the fan-and-light combination. In Queensland and northern NSW, a ceiling fan with an integrated light is often the only fitting in the room, so the downlight layout and the fan position have to be planned together. Fan blades sweep 300–450 mm below the canopy, exactly where a recessed fitting often sits, and the motor housing needs more depth than many 70 mm downlight cans provide. Check the manufacturer's stated maximum downlight depth before you commit to a layout.

Finally, the licensing question. Mains wiring in NSW requires a licensed electrician holding a Level 2 Service Licence, and Victorian and Queensland rules are just as strict for new circuits and for work behind a switch plate. A layout you draw yourself is perfectly fine as a plan; the connections that follow are not.

Warm-climate shortcuts that suit Australia

Australian summers push homeowners toward fewer, better-placed lights, working alongside airflow rather than against it. That is where old halogen habits get expensive: a 50–70 W halogen downlight has largely left the Australian market, replaced by an LED drawing closer to 8–12 W and lasting several times longer. Fewer fittings also mean fewer holes in the ceiling and a smaller draw on a rooftop solar array or battery on a hot afternoon.

Daylight does the heavy lifting when you plan for it. North-facing glazing in Brisbane and Perth throws light deep into the room for much of the day, while a south-facing lounge in Melbourne sits in shade, so two houses with identical floor plans can need very different fitting counts. Warm white at 2700–3000 K suits living spaces in Australian homes, a neutral 3500–4000 K works over benches and vanities, and mixing colour temperatures in one open room is the quickest way to make a new install look cheap.

Smart control has quietly changed how many fittings people need. Dimming a group of downlights through an app or a voice assistant lets one fitting cover several jobs, reducing both the fitting count and the switching. Tunable colour temperature does the same trick between summer and winter, and it is now standard in Australian lighting ranges.

Money is worth mentioning too. Households who fund a lighting upgrade from a side-hobby budget tend to care about how quickly funds move. Our explanation of live deposit payouts breaks down how instant banking and e-wallet transfers settle in practice, so you know what is available before committing to a hardware order.

Marking the layout and spacing at a glance

Start on paper. Measure the room, sketch it to scale, mark the existing switch and power points, and check where the studs or joists run. Timber joists usually sit 450–600 mm apart, and a recessed fitting needs clearance from them as well as from insulation, so a neat grid that ignores the framing ends up with holes you cannot use.

Mark proposed positions on the floor with tape, then project them onto the ceiling with a laser level or a straight broom handle held against a light. Getting a second pair of eyes to stand in the doorway and look at the tape grid is the cheapest check there is, and it catches awkward spacing that a plan never will. Where an old fitting already exists and suits the new layout, reuse the hole and save a ceiling patch.

The most common errors are predictable: spacing measured from the edge of the room instead of between fittings; too many lights in a small room, dimmed to nothing; extra fittings added to solve a dark corner when moving one light 150 mm would have worked; and a fan position chosen before the downlights, leaving blades to clip a fitting or fight it for space.

Room or area	Typical ceiling height	Centre-to-centre spacing	Notes
Living and family room	2.4–2.7 m	1.2–1.5 m	Keep 300–600 mm from walls; offset to avoid scalloping
Kitchen ambient layer	2.4–2.7 m	1.2–1.5 m	Coordinate with bench task lighting; avoid over splashbacks
Kitchen bench or island	Above cabinet run	500–600 mm	Under-cabinet strips are cheaper and cast no shadows
Bathroom or ensuite	2.4–2.7 m	600–900 mm	IP44 minimum, IP65 in shower zones; RCD protection
Bedroom	2.4–2.7 m	1.5–1.8 m	Add wardrobe or reading lighting separately
Alfresco or verandah	Open to sky	1.2–1.8 m	IP65 and marine-grade fittings; check wind rating
Garage or carport	2.4–3.0 m	1.5–1.8 m	Higher lumens; motion sensor if used occasionally

Adjust each figure for your own ceiling height using the halving rule and treat these as starting points, not specifications.

Plan the layout before you buy the fittings

Before ordering anything, measure the room, find the framing, mark a tape grid and walk the plan past a licensed electrician. A layout drawn in five minutes costs nothing; a ceiling full of poorly spaced downlights costs a carpenter, a painter and another weekend.

Pair this guide with our ceiling fan buying guide and the wider toolkit round-up on more DIY gear guides, then work through the room figures for your own house room by room. Subscribe to Bradley's Home for weekly guides on lighting, fans, security and upgrades, and bookmark this one so the next conversation about downlights starts with a measurement rather than a guess. Measure tonight, adjust for your ceiling height, and have the layout checked before anything is cut into the plaster.