This is the smallest Nella in the surface-mounted family and the one to reach for when there is no ceiling cavity to recess into a concrete slab, a rammed-earth soffit, a boat or a caravan roof, or any lining too thin to take a spring-clip fitting. The body is a plain aluminium cylinder 75mm across and 69mm deep, powder coated white, and it sits proud of the ceiling rather than in it.

Two body lengths on this page

Both SKUs are the same 7W light engine in the same 75mm shell. The standard body is 69mm deep; the extension body is 134mm deep, near enough double, and reads as a short barrel rather than a puck. Choose the extension when you want the fitting to be seen as an object, or when you need the light source pushed further down away from a deep bulkhead. Optically nothing changes same output, same beam.

Output, and which setting is brightest

Havit’s ordering row gives 525lm at 3000K, 560lm at 4000K and 540lm at 5500K. Read that again, because it is the opposite of what most people assume: the middle setting is the brightest, and going to the coolest setting costs you about 4% of the light rather than gaining any. Pick the colour on how you want the room to read, not on brightness. The beam is a wide 120, so this is a general-wash fitting and not a spot. Colour rendering is CRI>80.

Wiring extra-low voltage only

Both SKUs here are the 12V DC models. They need an appropriate constant-voltage LED driver, they must be wired in parallel if more than one is on the same run, and Havit prints the limit in capitals on the installation sheet: do not connect the light fitting directly to 240V. Because the fitting itself is extra-low voltage it is Protection Class 3 no earth is required at the fitting, which is exactly why this version exists. Havit specifies the 12V models as not dimmable; Triac dimming applies to the directly-wired version of the same body only, so dimming here has to be done at the driver if at all.

Installing it

The base plate comes off with an anti-clockwise twist, fixes to the ceiling through two 4mm holes on a 69mm plate, and the fitting unplugs from its driver so the plate can be mounted first. The colour switch is inside the fitting and preset to 3000K set it before you twist the body home, not afterwards. It is rated IP54 and IK07 with a semi-frosted glass lens, and Havit excludes aluminium fittings from sites within 5km of salt water. Lamp expectancy is >30,000hrs and the warranty is 3 years replacement. Lights For You lists this body in three wattages and both finishes, so a whole ceiling can be done in one look.

Questions

Does this one need a transformer or driver?

Yes. Both part numbers on this page are the 12V DC models and need an appropriate constant-voltage LED driver, sized above the total connected load. The fitting plugs into the driver rather than being hard-wired to it.

Which colour temperature gives the most light?

4000K, at 560lm. 3000K gives 525lm and 5500K gives 540lm so the coolest setting is not the brightest on this model. The difference across the three is small enough that you should choose on appearance.

What is the difference between the two options?

Only the depth of the body. The standard is 75 69mm and the extension is 75 134mm. Same 7W engine, same 525/560/540lm, same 120 beam.

Can it be dimmed?

Havit specifies the 12V DC models as not dimmable. Any dimming would have to happen at the driver, using a driver designed for it the fitting has no dimming circuit of its own.

Does it need an earth?

No. As an extra-low-voltage fitting it is Protection Class 3, so no earth is required at the fitting itself. The directly-wired version of the same body is Class 1 and does require one, which is why the two are not interchangeable.

Can I use it in a bathroom or outside under cover?

It is IP54 protected against dust and splashing water from any direction. That covers a covered alfresco ceiling or a bathroom outside the immediate shower zone. Havit also excludes aluminium fittings from sites within 5km of salt water.

How do I change the colour temperature after installation?

The slide switch is inside the fitting, and it ships preset to 3000K. Twist the body off the base plate, move the switch, and twist it back so it is worth setting every fitting on a run before any of them go up.