The 18W Nella in white the biggest body in the surface-mounted family at 157mm, and in white the one that disappears best against a plasterboard ceiling despite its size. Both the standard body and the longer extension body are sold from this page, so check the part number against the size column below before you order.

What IP54 means in practice

The rating is IP54: sealed against dust in harmful quantity and against water splashed from any direction. That is a genuinely useful rating and it has clear edges. It covers a covered alfresco ceiling, a carport soffit, a laundry, a bathroom outside the shower enclosure, and a garage where a car comes in wet. It does not cover a directly exposed soffit taking driven rain, or anything that gets hosed. The lens is semi-frosted glass and the body is IK07 for impact.

The siting restriction worth reading

Havit’s installation sheet carries a line that is easy to skip and expensive to ignore: aluminium and 304 stainless fittings must not be installed within 5km of a salt-water environment. That is a warranty condition, not a suggestion, and it rules this fitting out of most beachfront and estuary jobs regardless of how sheltered the ceiling looks.

Output and supply

Both SKUs give 1,380lm at 3000K, 1,430lm at 4000K and 1,305lm at 5500K through a 120 beam, at CRI>80. The brightest setting is 4000K the coolest is the dimmest here. Both run on 12V DC from a constant-voltage LED driver, wired in parallel, drawing 1.5A each, and Havit prints the boundary in capitals: do not connect the light fitting directly to 240V. The fitting is Protection Class 3 and needs no earth, and Havit lists the 12V models as not dimmable.

Sizes, and one figure we will not guess

The standard body is 157 85mm on a 153mm plate with three 4 10mm slots and one 4mm hole. For the extension body, Havit publishes no overall height in the sheets supplied with this product the drawing block exists but carries no readable figure, and the supplier’s own page for the extension model publishes no data sheet at all. We have left that row blank rather than scale it from the 7W and 12W models, which extend by 65mm and 67mm respectively; the pattern is suggestive and it is not a measurement. Ask us and we will get the number from Havit. Lamp expectancy is >30,000hrs, the colour switch is inside the housing preset to 3000K, and the warranty is 3 years replacement. Lights For You carries the black version and the two smaller bodies alongside it.

Questions

Can I put this outside?

Under cover, yes IP54 covers dust and splashing water from any direction, which suits an alfresco ceiling or a carport soffit. It is not suitable for a directly exposed position taking driven rain, or anywhere it will be hosed.

What is the 5km salt-water rule?

Havit excludes aluminium and 304 stainless fittings from installation within 5km of a salt-water environment. It is a warranty condition, so it applies even where the ceiling itself is sheltered.

How tall is the extension body?

Havit does not publish an overall height for it in the sheets supplied with this product, and its own product page for that model publishes no data sheet. We have deliberately left the figure out rather than estimate it ask us and we will get it from Havit.

Which colour temperature is brightest?

4000K at 1,430lm, against 1,380lm at 3000K and 1,305lm at 5500K. The coolest setting is the dimmest on this model.

What driver does it need?

A constant-voltage 12V DC LED driver sized above the total load. Each fitting is 18W and draws 1.5A, so four fittings is 72W and 6A on the low-voltage side.

Does it need an earth?

No Protection Class 3, because the fitting itself runs at extra-low voltage.

Both options look the same in the photo how do I tell them apart?

By part number and by the size column in the table below. HV5805T-WHT-12V is the standard 157 85mm body; HV5805T-WHT-EXT-12V is the longer extension body.