The Domus Cell 13 is a 13W tiltable deep-set LED downlight five switchable colour temperatures, dimmable, IP44,into a 9092mm cutout.

Five colour temperatures and the output changes with each

• A 17% spread between the dimmest and brightest settings, from the same13W.
• That is ordinary LED behaviour cooler phosphors convert more ofthe blue light they are given but it matters when you are working to a luxtarget, because switching the fitting from 5000K to 3000K after commissioning costs you about15% of the light.
• Design on the colour temperature you will actually use. If the room isgoing to sit at 3000K, plan on 995lm, not the headline figure.
• And note the peak is at 5000K, not at the top of the range 5700K gives slightly less than 5000K.

9092 mm cutout the figure that decides a retrofit

• The published cutout is 9092mm, which is the standardAustralian downlight aperture and makes this a straight swap for most existing90mm fittings.
• The tolerance range matters: a 90mm hole and a 92mm hole bothwork, which covers the variation you find in an older ceiling where holes were cut byhand.
• It is DEEP-SET, so check the plenum depth above the ceiling as well asthe aperture a deep-set fitting recesses the light source further up the housing, which iswhat gives it the glare control.

Deep-set and tiltable what that combination is for

• DEEP-SET means the LED sits further back in the housing, so the source isnot visible at normal viewing angles. It is the glare-control version.
• TILTABLE means it aims at a wall, a joinery face, artwork or afeature rather than straight down.
• Together they are the specification for a lit surface: you see the walllight up and not the fitting that did it.
• Tilting reduces the useful output onto the floor, so do not count tiltedfittings toward a general lux level.

The published specification

Where it works

• Retrofits into existing 90mm apertures the tolerance covers hand-cutholes.
• Wall-washing and feature lighting tilt it.
• Bathrooms and ensuites IP44.
• Rooms where the aperture should not glare deep-set.
• Not counted toward a floor lux level when tilted.

Specifying it

13W tiltable deep-set LED downlight. 9951163lm depending on colour temperature.2700 / 3000 / 4000 / 5000 / 5700K switchable. IP44. COB. 9092mm cutout. Dimmable. Aluminiumbody, black or white. 240V AC. 3-year replacement warranty. THE OUTPUT CHANGES WITH THE SWITCH 995lm at 3000K up to 1163lm at5000K, a 17% spread from the same 13W. Design on the colour temperature you will actuallyuse. And the peak is at 5000K, not at the top of the range.

Supplied and supported by Lights For You.

Questions

Does the light output change with the colour temperature?

Yes, and Domus publishes a figure for each setting: 1002 lumens at 2700K, 995 at 3000K, 1098 at 4000K, 1163 at 5000K and 1145 at 5700K. That is a 17% spread between the dimmest and brightest positions from the same 13W. It is ordinary LED behaviour cooler phosphors convert more of the blue light they are given but it matters when you are working to a lux target.

Which figure should I design on?

The colour temperature the room will actually sit at. If it is going to be left on 3000K, plan on 995 lumens rather than the headline figure switching from 5000K to 3000K after commissioning costs about 15% of the light. Worth noting too that the peak is at 5000K, not at the top of the range: 5700K gives slightly less.

Will it fit my existing downlight holes?

Very likely. The published cutout is 90 to 92mm, which is the standard Australian downlight aperture, so it is a straight swap for most existing 90mm fittings. The tolerance range matters more than it looks: a 90mm hole and a 92mm hole both work, which covers the variation you find in an older ceiling where holes were cut by hand.

What does “deep-set” mean?

The LED sits further back in the housing, so the source is not visible at normal viewing angles it is the glare-control version of the fitting. The trade-off is depth: check the plenum space above the ceiling as well as the aperture, because a deep-set housing needs more room above the lining than a shallow one.

What is deep-set plus tiltable for?

Lighting a surface. Tiltable means it aims at a wall, a joinery face, artwork or a feature rather than straight down, and deep-set means you do not see the source while you look at what it is lighting. Together they are the specification for a lit surface: the wall lights up and the fitting that did it stays discreet.

Can I count tilted fittings toward a lux level?

No tilting moves the light off the horizontal plane, so a tilted downlight contributes much less to a floor-level reading than a fixed one. Plan the general lighting with fixed fittings and treat the tilted ones as accent on top of it.

Can I use it in a bathroom?

Yes IP44, which is suitable for a bathroom ceiling outside the immediate shower zone. Check the zone requirements for your specific position, since IP44 covers splashing rather than direct jets.