HV2891T-BLK-12V - Mini Ollo Black LED Step Light with Eyelid

Two figures, both published by Havit, and you need to know which one applies before you cut. Without a canister the cut-out is Ø38 mm. With a canister it is Ø46 mm. The canister is the sleeve you set into concrete or masonry so the fitting drops into a finished hole. If you are going into a stud wall or a timber riser you generally will not use one. The trim overlaps the aperture in both cases, so measure the fitting or canister you actually have in hand rather than working back from the visible face.

No. This is a 12 V DC constant-voltage fitting and it must be run from a suitable 12 V DC constant-voltage LED driver. Havit's installation instructions say it in capitals: "DO NOT CONNECT LIGHT FITTING DIRECTLY TO 240V". There is also a distance rule that matters as much as the driver choice — the fitting cannot be installed more than 25 m from that driver, and Havit voids the warranty if it is. It is Protection Class 3, low voltage, and needs no earth. A licensed electrician has to do the work.

By which cable you connect, at install time. The neutral tails are marked for colour temperature: connect the 3000 K tail for warm white or the 5500 K tail for cool white, and join both tails together to get 4000 K. Whichever tail you do not use has to be terminated so it stays IP rated. The choice is permanent once the joins are soldered and sealed — there is no switch on this fitting and no remote — so settle it for the whole run before the first one goes in.

No. Both Havit sheets give the installation type as "Wall - Recessed" and Havit's own page calls it a recessed wall or step light. Nothing published for this model covers being walked on, driven over, or set into paving where water collects. Havit does make a Mini Ollo for that — it is a different model, HV2892T, described as a step or inground light — so if the fitting needs to go into the ground, that is the one to look at rather than this one.

Havit lists it as dimmable, on the data sheet, in the installation instructions and on its own product page. What none of those three publish is how — there is no dimming protocol, no named compatible dimmer and no driver list. Since the fitting takes 12 V DC constant voltage and has no control gear of its own, any dimming happens on the supply side, at the driver and its control. We have not filled that gap with a guess: check the dimming specification of the driver you intend to pair it with.

Here is exactly what the documents say, because the answer is narrower than a yes or a no. The salt-water rule in Havit's instructions for this fitting reads "Aluminium and 304SS fittings must not be installed within 5km of any salt water environments" — and this fitting is neither. Its body is 316 stainless steel. So that clause does not name it, and we have not applied it. Equally, Havit publishes no coastal approval for this model, so we are not claiming one. What does apply in any exposed position is the maintenance condition below.

Yes. Havit's instructions are unqualified on this — "All 316 stainless steel fittings must have regular cleaning maintenance to avoid any tea staining from forming on fitting", and the same line adds that "Warranty does not cover Tea Staining". The powder coating is on the face; the body underneath it is 316 stainless, so the fitting is covered by that clause regardless of what colour the visible trim is. Wash it down with clean water as part of normal outdoor maintenance and more often anywhere salt or grit is carried onto it.