The HV5529D2W is the dim-to-warm Gleam: a 9W deep recessed downlight on a 76mm cut-out whose colour temperature falls from 3000K to 1800K as it is dimmed, the way an incandescent lamp used to. Seven insert combinations sell from this listing HV5529D2W-BB, -BC, -BG, -WB, -WC, -WG and -WW each a complete luminaire supplied with its driver, flex and plug.

The condition that makes the feature work

Dim to warm is not a setting. It is a response to being dimmed, so the fitting has to be on a dimmer to do it at all. Havit states the requirement plainly for these part numbers: this fitting must be used with a Triac dimmer to achieve the dim-to-warm function. Wired to a plain switch it works perfectly well as a light and simply stays at 3000K for its whole life, which is the single most common disappointment with this class of product. Havit offers the HV9625 Triac dimmer to suit its Triac dimmable drivers.

Output, and why there is only one figure

Havit publishes 685lm for this model one number, not three, because the light does not have selectable settings to measure separately. That figure is the full-output reading at the top of the 1800K3000K range; dim it and both the level and the colour move together. The beam is 90 from a labelled beam-angle column on the model’s own dated sheet, and colour rendering is CRI>80. The face is fixed with no tilt.

Cut-out and depth

It shares the 76mm cut-out and the 82mm 66mm body of the tri-colour HV5529T, rising to about 76mm deep with the HV5528-IC4CAP. As on that model, the installation sheet’s specification table prints a 90mm cut-out that contradicts its own dimension drawings; the dated data sheet, the drawings and Havit’s product pages all give 76mm. It is IC-4 only when the HV5528-IC4CAP is fitted, that rating covers the fitting only and the driver may not be installed under insulation, and the fixture must not be used with loose-fill insulation such as macerated paper or wool.

Wiring, rating and warranty

It runs on 240V AC from a separate driver onto a plug base in the ceiling, is Protection Class 2 so no earth is required at the fitting, and is IK08 and rated >30,000hrs. IP54 applies to the front of the fitting only. Havit’s warranty line for these part numbers reads “3 Years replacement warranty (items ordered after 01/01/22)”, and Havit also publishes a DALI-dimming equivalent through its Commercial range. Lights For You lists the tri-colour HV5529T on the identical cut-out if fixed colour selection suits the room better.

Questions

Does it dim to warm on any dimmer?

No Havit states that this fitting must be used with a Triac dimmer to achieve the dim-to-warm function. On a plain switch it lights normally and stays at 3000K, so the feature you bought it for never appears. The HV9625 Triac dimmer is offered to suit Havits Triac dimmable drivers.

What colour range does it cover?

1800K at the bottom of the dimming curve to 3000K at full output. 1800K is a deep candle-warm tone, well below the 2700K of a warm-white lamp.

What cut-out does it need?

76mm the same as the tri-colour HV5529T. Its dated data sheet and dimension drawings both state 76; note that the installation sheets specification table prints 90mm, which contradicts the drawings on the same page and is not the figure to cut to.

Why is only one lumen figure published?

Because there are no selectable colour settings to measure separately. Havit publishes 685lm at full output; as the fitting is dimmed the level and the colour temperature fall together.

Can it be covered by insulation?

Only with the HV5528-IC4CAP fitted, and only the fitting itself. Havit states the driver may not be installed under insulation and must sit above it to ventilate, and that loose-fill insulation such as macerated paper or wool must not be used with this fixture.

Does it need an earth?

No. It is Protection Class 2 and arrives with a flex and plug for a plug base installed in the ceiling.

Is it suitable for a bathroom?

The IP54 rating covers the front of the fitting only, so a bathroom or laundry ceiling outside the immediate shower zone is fine. It is not rated for an exposed outdoor ceiling.