Graphite over solid brass is an unusual combination and a deliberate one: the dark, near-black finish that architects specify, on a metal that survives outdoors indefinitely. A graphite powder coat over aluminium eventually chips and shows silver underneath; here the substrate is brass, so wear darkens rather than exposes. This is the double adjustable version, with two independently aimed heads.

Two heads, and a fitting rated for ceilings too

Each head tilts through 90 and swivels through 270 from one wiring point, so you can converge both beams on a single target, split them across a facade, or send one up and one down. Havit’s current data sheet also rates this one for ceiling surface mounting as well as wall, which makes it usable under a soffit or eave without changing product.

• HV1375T 240V GU10 with 9-in-1 switchable globes: 2 240560lm at 3000K, 2 255595lm at 4000K, 2 270630lm at 5500K across 3W, 5W and 7W per head, in 60 beams.
• HV1377GU10T 240V GU10 at a fixed 5W per head: 2 270lm, 2 285lm, 2 300lm, in 120 beams.
• HV1377MR16T the same output on 12V DC MR16, needing an external supply.

Every figure is per head, exactly as the datasheet prints it. Each of the two lamps produces the stated output; the fitting does not concentrate the sum into one beam.

Worth knowing before you specify a dimmer

None of the three versions is dimmable with the globes supplied including HV1375T. That is worth stating plainly, because several of its siblings in this range are Triac dimmable on the switchable-globe model and it would be reasonable to assume this one follows. It does not. If dimming matters on this job, tell us and we will point you at a version that does it.

Specifying it

The GU10 versions are Class1 and need an earth; the MR16 version is Class3 low voltage and does not, but it requires a 12V DC driver sized for two lamps per fitting, sited within 25m, with the supply inside 5% of nominal. Globe ceilings are 35W per lamp on GU10 and 20W per lamp on MR16. Havit rates the body IK10 for impact, fits clear glass rather than a diffuser so the beams stay defined, and quotes CRI above 80, colour consistency within 6 SDCM, glare under UGR 45 and lamp life above 30,000 hours. IP65, and a 3-year replacement warranty on all three. Lights For You stocks the matching single adjustable in the same graphite brass.

Questions

Can this one be dimmed?

No not on any of the three versions with the globes supplied. Some other Tivahs are Triac dimmable on their switchable-globe model; this one is not, so do not assume it from the range.

Is the graphite a coating over aluminium?

No. The substrate is solid brass with a graphite finish, so wear darkens the surface rather than exposing a different metal underneath.

Are the lumen figures per head?

Yes. The datasheet writes 2 270 lm, 2 285 lm and 2 300 lm because each of the two lamps produces that output.

Can it go on a ceiling or under an eave?

Yes. Havit rates this one for wall or ceiling surface mounting.

Does the MR16 version need an earth?

No, it is Class 3 low voltage. The GU10 versions are Class 1 and do require an earth.

What is the maximum globe wattage?

35 W per lamp on the 240 V GU10 versions and 20 W per lamp on the 12 V MR16 two globes at that ceiling, not one of twice it.

Is it suitable near the coast?

Solid brass is one of the sensible choices there. It still wants regular washing down, and tea staining is excluded from the warranty.