Siena LED Up and Down Wall Light CCT 12w Black, White Havit Lighting - HV3657T

The HV3657T is the larger Siena — the same slim rectangular up-and-down wall light in poly powder coated aluminium, stretched to 220 mm and stepped up to 2 × 6 W. Two built-in LED emitters wash a soft 120° spread up the wall and down it. Against the 162 mm HV3655T it is the one to choose where the wall is tall, the spacing is wide, or the fitting needs enough visual weight to hold its own beside a double garage door.

Two emitters, and every figure below is per direction

Havit prints the output as 2 × 345 lm at 3000K, 2 × 350 lm at 4000K and 2 × 345 lm at 5500K. Those are per direction — what one emitter delivers, produced twice by the fitting. Wattage works the same way: the listing is titled 12 W because that is the total, while the data sheet states 2 × 6 W. Both numbers are correct and they measure different things, so we give the per-emitter draw and the count rather than let one figure imply a single 12 W source.

4000K is the brightest, and the warm and cool settings are identical

Two things here run against the usual assumption. First, output peaks in the middle: 4000K gives 350 lm per direction, the most this fitting produces. Second, 3000K and 5500K are the same — 345 lm each. That is not a misprint and it is not a rounding artefact; Havit publishes the identical figure at both ends on both finishes. So on the Siena the colour switch changes how the light looks and not how much of it there is, within five lumens across the whole range. Choose the setting on the tone you want against the wall.

The colour is set once, inside the fitting

It is tri-colour — 3000K, 4000K or 5500K — on a slide switch located inside the base, and Havit ships it preset to 3000K. Changing it means loosening the allen screws in the side, lifting the body off its base plate and moving the switch, so it is a call made at install rather than adjusted afterwards from the ground.

The seal is what the warranty rests on

Havit’s instructions are explicit. Seal every hole, including the cable entry and around the screws; tighten the allen screws fully so water cannot get in; and run silicone around the edge of the fitting. Every o-ring and seal must be correctly seated to maintain the warranty, and modifying the fitting voids it outright. It is rated IP54 behind a frosted glass diffuser with an IK08 impact rating — ratings that assume the installation was sealed properly. Power is 240 V mains with no driver or transformer, and it is Class 1, so an earth is required.

Siting and size

The Siena is aluminium, and Havit states that aluminium and 304SS fittings must not be installed within 5 km of any salt water environment — so for a beachside address, ask us for a marine-grade option instead of specifying this. The body measures 220 mm long by 72 mm wide, mounting on a base plate with two Ø4 mm fixings and a Ø13 mm cable entry. No wall projection is published: Havit’s drawing leaves that dimension unlabelled, and the dimensioned drawing on this page is the reliable reference. The fitting is Triac dimmable and Havit lists the HV9625 300 W dial dimmer as its accessory. At Lights For You we keep both Siena lengths in black and white, and we will happily work out spacing with you before anything is ordered.