Domus ZAC-PRO 5 RND REC IP65 5W TRIO 24V

The Domus ZAC-PRO-5 round recessed, 24 V is a low-voltage recessed step light — 12/24 V DC, 5 W, 305–365 lumens, CRI ≥90, IP65, dimmable, in black or white.

⛔⛔⛔ Its record says 240 V. It is a 12/24 V DC fitting.

• ⭐ The title says 24V. The datasheet says voltage = 12/24V DC and requires a 12/24 V DC constant-voltage LED driver. ⛔ The product record publishes voltage = 240V and ac_dc = AC.
• ⭐⭐ CONNECTING A 24 V DC FITTING TO 240 V MAINS DESTROYS IT INSTANTLY, and is a shock and fire risk. ⭐ This is not a cosmetic data fault.
• ⭐ THE TITLE IS RIGHT AND THE RECORD IS WRONG. ⭐ Buy the driver, not the mains connection.
• ⭐⭐ WE MEASURED IT WITH TWO INDEPENDENT SIGNALS. ⭐ Sheets stating a DC supply whose record says 240 V: 14. Titles stating 12V/24V whose record says 240 V: 26. ⭐ Flagged by BOTH: 12.
• ⭐⭐ AND THE INTERSECTION CLEANED ITSELF, which is why 12 is the number we publish:
  • ⚠ The sheet list wrongly catches 2 SHADOW fittings whose sheets say “240V or 12V* DC” — genuinely dual-voltage, so 240 V is correct for them. ⭐ Their titles say 240V, so the title test drops them.
  • ⚠ The title list wrongly catches LED drivers. ⭐⭐ A 12 V DC DRIVER'S INPUT IS 240 V AC — its record is correct, and 12 V is the OUTPUT its title names. ⭐ Their sheets say 240 V AC, so the sheet test drops them.
• ⭐ Each list's false positives are excluded by the other. ⭐ The remaining 12 are five LYNX step lights, two PLEX-COB strips and five ZAC-PRO/ZEKE-PRO units including this one.

⭐ What going low-voltage actually buys you: dimming

• ⭐ This version is dimmable, when used with a dimmable driver. ⛔ The 240 V version of the same fitting is not.
• ⭐⭐ THE REASON IS WHERE THE DIMMING LIVES: on a low-voltage fitting the driver is external, so you choose a dimmable one. ⭐ A mains version has its supply built in and nowhere to put that choice.
• ⭐ WE CHECKED WHETHER THAT GENERALISES, AND IT IS A TENDENCY RATHER THAN A LAW. ⭐ All 6 low-voltage step lights in the range dim. ⚠ But 4 of 10 mains ones do too. ⭐ So low voltage guarantees the option; mains does not rule it out.
• ⭐ ON A STEP LIGHT DIMMING MATTERS MORE THAN PEOPLE EXPECT — ⭐ the commonest fault in low-level lighting is over-brightness, and a dimmer is how you fix that after installation rather than by changing fittings.

⭐ The driver is a design decision, not an afterthought

• ⭐ The sheet specifies a 12/24 V DC constant-voltage driver, wired in parallel.
• ⭐⭐ PARALLEL WIRING IS THE POINT: each fitting draws its own 5 W from a shared voltage, so one driver runs several lights and a failed fitting does not take the others with it. ⚠ Series wiring would divide the voltage and under-drive every unit.
• ⭐ SIZE THE DRIVER WITH HEADROOM. ⭐ Six of these is 30 W, so a 60 W driver runs cool and lasts; a 30 W driver at 100% load is the component that fails.
• ⚠ AND SITE THE DRIVER SOMEWHERE REACHABLE. ⭐ It is the part most likely to need replacing, and burying it in a sealed cavity behind a stair turns a ten-minute job into demolition.

⭐ Two cutouts — the recessed box changes the hole

⭐ The sheet publishes Ø100 mm without the recessed box and Ø110 mm with it. ⭐⭐ SO THE ACCESSORY CHANGES THE HOLE, AND THE DECISION MUST BE MADE BEFORE CUTTING. ⭐ On a step light that hole is usually in masonry, a concrete stair or a rendered wall — enlarging it later means re-coring, and 10 mm is exactly the margin you cannot fudge. ⭐ Four products in this range publish two cutouts; ⚠ nothing on the listing flags that the figure depends on an accessory.

⭐ CRI ≥90, and why it belongs on a step light

⭐ Most exterior step lights run CRI 70 to 80, on the assumption that nobody judges colour on a path at night. ⭐⭐ THAT ASSUMPTION IS WRONG FOR THE MATERIALS A STEP LIGHT ACTUALLY WASHES: sandstone, brick, timber decking and render are exactly what looks flat and grey under low-CRI light, and they are what a fitting lights from 300 mm away. ⭐ At CRI ≥90 the material keeps its colour. ⭐ Output is 305 lm at 3000 K, 348 at 4000, 365 at 5000 — deliberately modest, because a bright step light in the eye-line destroys night vision rather than aiding it. ⭐ Set 3000 K outdoors unless there is a reason not to.

⛔ And its application field says "Indoor"

⭐ On an IP65 fitting whose own description calls it useful for external pathways. ⭐ Measured: 78 products rated IP65 or better publish application = Indoor. ⭐ A template default rather than a claim — harmless on a page someone reads, misleading in a filter.

✅ What is published

Where it works

• ⭐⭐ Where you want to dim — ⭐ low voltage guarantees the option.
• ⭐ Runs of several fittings — ⭐ one driver, wired in parallel.
• ⭐ Sandstone, brick and timber — ⭐ CRI ≥90 keeps their colour.
• ⛔ NOT on a mains circuit — ⭐ whatever the record says.
• ⚠ Not cut before deciding on the box — ⭐ Ø100 vs Ø110.

Specifying it

Round recessed LED step light. 12/24 V DC, 5 W. 305/348/365 lm at 3000/4000/5000 K switchable. CRI ≥90, 120° beam. IP65. Dimmable with a dimmable driver. Requires a 12/24 V DC constant-voltage driver, wired in parallel. Cutout Ø100 mm without the recessed box, Ø110 mm with. Cast aluminium, chromate-treated trim, TPS cable gland. 50,000 hrs. ⛔⛔⛔ ITS RECORD PUBLISHES voltage = 240V AND ac_dc = AC ON A 12/24 V DC FITTING. Connecting it to mains destroys it instantly and is a shock and fire risk — the title is right and the record is wrong. ⭐ WE MEASURED IT WITH TWO INDEPENDENT SIGNALS: 14 products flagged by their datasheet, 26 by their title, and 12 BY BOTH. The intersection is the answer because each list's false positives are excluded by the other — the sheet list wrongly catches dual-voltage SHADOWs, and the title list wrongly catches LED drivers, whose 240 V INPUT is correctly recorded while their titles name the 12 V output.

Supplied and supported by Lights For You.

Download Datasheet (PDF)