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The Domus DECO-20 is a 20 W commercial LED downlight with a deep-set anti-glare frame, an ultra-slim 43 mm housing and a 90° spread, switchable 3000 K / 4000 K / 5700 K, in TRIO, DALI or 0–10 V, black or white.
⛔ It needs a Ø160–170 mm hole. That is not a normal downlight cutout.
Most downlights in this catalogue take Ø90 mm. This one takes a hole nearly twice the diameter — and the fitting is Ø190 mm across the visible face.
✅ The upside is that only 43 mm of it sits above the ceiling, so it goes where a deep fitting cannot — a shallow void, a bulkhead, a floor above. ⛔ But it cannot replace a Ø90 mm downlight without cutting the ceiling open, and that is a decision to make before anyone starts, not after.
| Variant | Control | Use it when |
|---|---|---|
| TRIO | Dip switch at the back sets the colour; dimmed by a wall dimmer | Homes and small commercial |
| DALI | Addressable digital control | A building with a DALI system |
| 0–10 V | Analogue dimming control line | Commercial systems using 0–10 V |
⚠ Our record types this whole product as “Dali”. It is one of the three variants, not the product. ⚠ The 0–10 V variant also does not appear in the datasheet's own item table, so its figures are not independently confirmed here. Tell us the control system and we will confirm the right variant with Domus.
The LED sits back behind the aperture, which is what makes a 1,800-lumen fitting usable in a room people work in.
20 W commercial recessed LED downlight, deep-set anti-glare frame, ultra-slim housing. Ø190 mm face, 43 mm deep. ⛔ Cutout Ø160–170 mm. Output 1,700 / 1,750 / 1,800 lm at 3000 K / 4000 K / 5700 K (switchable by dip switch on the TRIO). 90° beam, CRI ≥80, SMD, 50,000 hrs. Complete with a dimmable LED driver and flex and plug. ⚠ Dimming tested on the Domus dimmer series; other dimmers untested. 220–240 V AC. ⚠ IP44 from the underside once installed — not a sealed rating for the void. Available as TRIO, DALI or 0–10 V, black or white (⚠ our record types the whole product “Dali”, which is one variant of three). Warranty 3 years.
Supplied and supported by Lights For You.
Ø160–170 mm, which is not a normal downlight cutout — most fittings in this catalogue take Ø90 mm. The visible face is Ø190 mm. It cannot replace a standard downlight without cutting the ceiling open, so this is a decision to make before anyone starts rather than after the first hole is enlarged.
Because only 43 mm of it sits above the ceiling. That ultra-slim housing goes where a deep fitting cannot — a shallow void, a bulkhead, an apartment with a floor slab close above. Combined with 1,800 lumens at a 90° spread, it covers a commercial floor with fewer fittings than a standard downlight would.
How it is controlled. TRIO sets the colour with a dip switch at the back and dims from an ordinary wall dimmer — the choice for homes and small commercial. DALI is addressable digital control for a building with a DALI system, where each fitting has an address. 0–10 V is an analogue dimming control line used in some commercial systems. Our record types the whole product as "Dali", which is one variant of three, so tell us your control system and we will confirm the right one.
Outside the shower zone, yes. The datasheet's wording is precise and worth quoting: IP44 "from the underside of the downlight once installed into the ceiling". That means it is protected from the room side, not that the back of the fitting is sealed in the void, and the rating does not apply before it is installed. Subject to your electrician and the zones in AS/NZS 3000.
The Domus dimmer series is the tested pairing. The datasheet says it "may work on others but has not been tested", which is materially weaker than simply calling it dimmable — and our record shows only the word "dimmable". Tell us the dimmer you intend to use and we will tell you whether it is tested before you buy both.
At 1,800 lumens with a 90° spread it is a commercial fitting, and in a normal room you would use fewer of them than you would standard downlights. The deep-set anti-glare frame is what makes that output tolerable to sit under — a flat 20 W downlight at this spread would be uncomfortable. Tell us the room and we will work out the count.
Only 43 mm behind the face, which is one of its main advantages. The constraint here is the cutout diameter rather than the depth — Ø160–170 mm needs clearance between joists or battens, so check the framing as well as the void.
| Brand | Domus Lighting |
|---|---|
| Model / SKUs | DECO-20 — 20433/20432 (TRIO black/white) · 21595/21594 (DALI black/white) · 21875 (0–10V white) |
| Mounting | Recessed |
| Cutout | ⛔ Ø160–170mm — not a standard downlight hole |
| Face / depth | Ø190mm face · 43mm deep — ultra slim |
| Wattage | 20W |
| Lumen Output | 1,700lm @3000K · 1,750lm @4000K · 1,800lm @5700K |
| Colour Temperature | 3000K / 4000K / 5700K — switchable (TRIO) |
| Control versions | TRIO · DALI · 0–10V — ⚠ our record types the product "Dali" |
| Beam Angle | 90° wide |
| Colour Rendering | CRI ≥80 |
| IP Rating | ⚠ IP44 — from the underside once installed; not a sealed rating for the void |
| Dimming | ⚠ Tested on the Domus dimmer series; other dimmers untested |
| Driver | Dimmable LED driver with flex and plug |
| Voltage | 220–240V AC |
| Lifespan | 50,000hrs |
| Finishes | Black · White |
| Warranty | 3 Years |
| Variant | Control | Specify it when |
|---|---|---|
| TRIO | Dip switch colour + wall dimmer | Homes and small commercial |
| DALI | Addressable digital | The building has a DALI system |
| 0–10V | Analogue control line | ⚠ Commercial 0–10V systems — not in the sheet's item table |
For all warranty claims please ensure you have your proof of purchase at hand, an invoice from your electrician from the installation and check the faulty product is within the applicable warranty period. Warranty is replacement only.
Lights For You is not responsible for damages caused by unprofessional installation, modified products or manipulated by the customer or by any other person not authorised by the manufacturer; as well as by improper use, manipulation and/or short circuits, apparent signs of improper treatment.
Notification of any damages or missing items must be received by Lights For You within seven (7) days of receipt of the product. Please email photos to ashfield@lightsforyou.com.au.
If the product is to be repaired or replaced, it must correspond to the one originally sent by Lights For You and the customer must include the delivery note and/or invoice.
You must lodge a return request via the below request form.
Credits will be issued in the form of store credit or gift voucher and will be equal to the price paid for the product minus the cost of shipping. Store credit vouchers are valid for six months from the date of issuance.
We reserve the right to refuse a return in cases where we cannot be reasonably satisfied that you purchased the product from us or where we are not responsible for the damage in accordance with our Faults & damages policy.
Customers who wish to cancel all or part of an order due to change of mind or incorrectly ordered may do subject to cancelling in within 12 hours, during business hours from time of purchase. Once products have been shipped, you cannot cancel them.
Please refer to the following link to learn more about our policies
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