Walk through any Australian home built before 2010 and you will find the same fitting in most rooms: a round glass or acrylic dish screwed flat to the ceiling. The trade calls it an oyster. Every renovation article tells you to replace it with a pendant. Most of the time that advice is given without anyone asking how high the ceiling is or whether the room has anywhere to put a hanging light.
This guide sets out what actually separates the two shapes, which of the rules you will read online apply in Australia, and how to choose without paying an electrician to find out you were wrong.
What actually separates the two
An oyster, or flush mount, sits against the ceiling. It throws light sideways and down across a wide angle, so it fills a room evenly and casts soft shadows. It also disappears. Nobody looks up at an oyster, which is the point in a bedroom and a problem in a dining room.
A pendant hangs. It concentrates light on whatever is underneath it, leaves the edges of the room darker, and becomes an object you can see from across the house. That is a decision about the room, not about brightness.
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Where the oyster wins
Anywhere people walk under it. Hallways, laundries, bathrooms, small bedrooms, garages and any room where the ceiling is at or near the Australian minimum. It is also the only sensible answer in a room with a ceiling fan, because a pendant and a fan in the same space either fight for the centre or throw a moving shadow across the whole room.
Where the pendant wins
Over something. A kitchen island, a dining table, a bedside, a stairwell void. A pendant hung over open floor is a head injury waiting to happen and it lights nothing in particular. If you cannot name the surface it is lighting, you want an oyster.
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Measure the ceiling before you shop
Almost every pendant drop recommendation online is written for an American ceiling of eight feet, which is 2.44 metres. Australian ceilings are not built to that number.
The National Construction Code sets a minimum of 2.4 metres in a habitable room. New builds are commonly 2.7 metres, and older Queenslanders and Federation homes run past 3 metres. A drop that looks generous under 2.7 metres is a hazard under 2.4 metres, and the same fitting looks lost under 3.3 metres.
Take the measurement once, write it on your phone, and use it for every lighting decision in that room. It costs a minute and it settles half the argument.
Clearance: the number that matters more than style
There is no Australian standard telling you how low a pendant may hang in a home. What there is instead is a practical floor: nobody should have to duck.
Over a walkway or open floor, keep the bottom of the fitting above head height for the tallest person who uses the room, with room to raise an arm. Over a surface such as a table or an island bench, the bottom of the shade can sit much lower, because the surface itself keeps people out from under it. The measurement that counts there is from the bench top, not from the floor.
Sightlines matter as much as heads. A row of pendants over an island that blocks the view of whoever is standing on the other side will annoy you every day. Sit down, look across, and check before the electrician drills.
Hardwired or plug-in: this is the expensive question
Both an oyster and most pendants are hardwired to 240 volts. Under AS/NZS 3000:2018, amendment 3 of 19 May 2023, installing a hardwired fitting requires a licensed electrician. That is not a recommendation and it is not about warranty.
Queensland writes the boundary plainly. Under the Electrical Safety Act 2002, section 18(2), electrical work does not include connecting equipment by a flexible cord and a plug. A lamp you plug in is yours to install. A fitting you wire in is not. In New South Wales, unlicensed electrical work carries penalties of 22,000 dollars for an individual and 110,000 dollars for a company, updated 23 June 2026.
The practical consequence for renters, and for the 30.6 per cent of occupied Australian dwellings that were rented at the 2021 census, is that neither shape is available without the landlord. That is where plug-in and rechargeable fittings earn their place, and we cover those in our guide to cordless and rechargeable lamps.
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The only lighting rule that is actually enforceable
Australians read a great deal about how many lumens a room needs. There is no Australian standard for that in a home. AS/NZS 1680 is a workplace standard and its scope explicitly excludes decorative lighting. The only residential figure we could find in a published standard is AS 4299-1995 Adaptable Housing, which sets 300 lux as a minimum for a living area.
What the National Construction Code does set is a ceiling on power, not a floor on brightness: 5 watts per square metre of lighting power density in a class 1 dwelling, 4 watts under a veranda and 3 watts in a garage. It also sets 20 lux as the minimum illuminance for moving safely on a surface.
Five watts per square metre sounds tight until you do the arithmetic with LED. A 16 square metre bedroom gets 80 watts, which at the GEMS efficiency floor of 120 lumens per watt is a great deal more light than anyone wants in a bedroom. The rule only bites if you are still buying halogen.
Room by room
- Kitchen. Oyster or spotlights over the floor, pendants over the island only.
- Dining. Pendant, centred on the table and not on the room.
- Living. An oyster for the fill, then lamps for everything else. Our living room guide sets out the layers.
- Bedroom. Oyster, dimmable, with bedside lighting doing the work at night.
- Hallway and laundry. Oyster, every time.
- Stairwell void. The one place a long pendant is genuinely the right answer.
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Swapping an oyster for a pendant: what it really involves
The ceiling rose is already there, so the swap looks like a half hour job. It often is. What catches people out is everything around it.
An oyster hides the ceiling behind it. A pendant does not, so a patched or discoloured circle appears the moment the old fitting comes off, and it has to be filled and painted before the new one goes up. The old fitting may also be sitting over a hole cut wider than the new canopy, which means a ceiling patch rather than a paint touch up.
Weight, and the switch
Weight is the second surprise. A plaster ceiling will hold a light pendant on its rose, and a heavy multi arm fitting needs to be fixed to a batten or a noggin. That is a decision for the electrician, made on site, and it is worth asking before you buy something at the heavier end.
The third is the switch. An oyster is usually on a plain switch. If you want the pendant dimmable, the dimmer goes in at the same visit, and the fitting and the dimmer have to suit each other. Sorting that out on the same trip costs far less than a second call out.
What to read on the specification
Shape is the easy half. The specification decides whether you like the fitting in six months.
- Lumens, not watts. Watts tell you the running cost, lumens tell you the light.
- Colour temperature, and whether it is switchable. A fitting that steps between warm and cool lets you correct a decision you cannot judge in a showroom.
- Dimmable or not, and if so, on what kind of dimmer.
- Diameter. Compare it against the furniture underneath, not against the room.
- Integrated LED or replaceable lamp. An integrated fitting is slimmer and is a whole new fitting when it fails.
Browse the full range of ceiling lights and pendant lights, or start from the room you are lighting.
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The short answer
If people walk under it, fit an oyster. If it hangs over a surface you can name, fit a pendant. Measure the ceiling before you decide either, and remember that both of them need an electrician unless the plug is on the end of a cord.
Sources
National Construction Code 2022, minimum ceiling height in a
habitable room and lighting power density, Australian Building Codes Board.
AS/NZS 3000:2018 Wiring Rules, amendment 3, 19 May 2023.
Electrical Safety Act 2002 (Qld), section 18(2).
NSW Fair Trading, penalties for unlicensed electrical work, updated 23 June 2026.
AS 4299-1995 Adaptable Housing, living area illuminance.
GEMS (Lighting Products) Determination 2025, efficacy floor, in force 3 March 2026.
Census of Population and Housing 2021, tenure type, Australian Bureau of
Statistics.