The black 7W Nella, in both body lengths. It is the same 75mm aluminium cylinder as the white version with a black powder coat, and the finish does more work here than it usually does: a black surface-mounted fitting on a white ceiling is a deliberate mark, not a disappearing one. If you want the fitting to read as part of the architecture, this is the one; if you want it to vanish, take the white.

What the extension body actually buys you

This page sells the standard body at 75 69mm and the extension body at 75 134mm. The extension is not an optical change the light engine, the 120 beam and the output are identical it is a proportion change. At 69mm the fitting reads as a disc; at 134mm it reads as a barrel and casts a visible shadow line on the ceiling around it. It is also the version to use where a deep coffer or bulkhead would otherwise shade the beam, because it drops the source clear of the recess.

Output and colour

Three switchable settings: 525lm at 3000K, 560lm at 4000K, 540lm at 5500K. The peak sits in the middle 4000K is the brightest of the three on this model, so there is nothing to be gained by going cooler. The switch is inside the fitting and ships preset to 3000K, so set it before the body is twisted onto its plate. Colour rendering is CRI>80, which is the ordinary standard for a general-purpose downlight; for colour-critical work look at a CRI>90 fitting instead.

Supply and protection

Both part numbers here run on 12V DC from a constant-voltage LED driver, wired in parallel where more than one shares a run, and Havit’s own installation sheet is blunt about the limit: do not connect the light fitting directly to 240V. The fitting is Protection Class 3, so no earth is landed at the fitting the reason this version is specified over water, in marine fit-outs and in vehicles. Havit lists the 12V models as not dimmable.

Fixing and rating

The plate is 69mm with two 4mm holes and 28mm deep; the body twists onto it and the fitting unplugs from its driver, so the plate can be fixed and wired before anything else goes up. It is IP54 against dust and splashing, IK07 for impact, with a semi-frosted glass lens and >30,000hrs of rated life. Havit excludes aluminium fittings from sites within 5km of salt water, which matters more for a black anodised-look finish than most people expect. Warranty is 3 years replacement, and Lights For You holds this range in matching 12W and 18W bodies so a mixed ceiling still looks like one family.

Questions

Is the extension version brighter?

No. Both bodies use the same 7W engine and give 525/560/540lm with a 120 beam. The extension changes only the depth of the housing 75 134mm against 75 69mm.

Why choose the extension body?

Two reasons. Proportion at 134mm the fitting reads as a barrel rather than a disc and clearance, because it drops the light source clear of a deep bulkhead or coffer that would otherwise clip the beam.

Does the black finish run hotter?

Havit publishes no separate figure for the black version; both finishes share one data sheet, one 7W rating and one >30,000hr lamp expectancy. The driver, not the finish, is what needs ventilation.

What supply does it need?

12V DC from a constant-voltage LED driver. Multiple fittings on one driver must be wired in parallel, and the fitting must never be taken directly off the house supply.

Is an earth needed?

No it is Protection Class 3. That is the practical reason to specify the extra-low-voltage version rather than the directly-wired one.

Can I put it on a dimmer?

Not at the fitting. Havit specifies the 12V models as non-dimmable; any dimming would have to be done by a driver designed for it.

Where can it go?

IP54 covers dust and splashing water from any direction a covered outdoor ceiling, a laundry, a bathroom outside the shower zone. It should not be installed within 5km of salt water.