Square 270mm Aluminum Waterproof IP65 15W 18W LED Bulkhead Light

The ILED-BH-R275 S is the plain diffuser version of the Square 270mm bulkhead. The square 270×270mm face sits flush against a flat wall or a grid ceiling in a way a round housing does not, and the plain diffuser is the one of the four faces in the series that lets the most light out of the LED array. That makes it the face to use where the light level matters more than the glare control that a gridded or shrouded diffuser gives you.

The two outputs

There are two wattages in the model. The 15W version puts out 1400 lumens, and the 18W version puts out 1700 lumens. Both run from the same 270×270×86mm body at 90 to 100 lumens per watt, so the choice between them is about how bright the position needs to be, not about a different fixture. A narrower corridor or a single wall goes with the 15W; a wider walkway or a position that has to carry more of the room goes with the 18W.

The plain diffuser

The diffuser is a clear anti-UV polycarbonate panel that takes the whole face of the housing. It is the highest-output face in the series: the gridded and shrouded faces in the same housing trade some of that output for softer, more directed light, and the plain face does not. For a position where you want the most light out of a 270mm square, this is the face. The polycarbonate is treated against UV, so the panel does not yellow the way an untreated one does after a season outdoors.

Body and installation

The body is die-cast aluminium with a powder-coated finish, available in white, black or silver gray. The gasket between the body and the diffuser is what carries the IP65 rating, so the seal has to be kept clean and intact when the fixture is fitted. The driver is built into the body, which means there is no separate supply to find a place for. Wiring is direct to the mains through the terminal block, and the fixture is Class I, so the circuit needs an earth. It surface-mounts on the four points on the back plate, or recesses into a 270×270mm cutout where the construction allows.

Choosing the colour temperature

The colour is set on an internal switch, with 2800K warm white, 4000K neutral and 6500K cool white. The switch is inside the fixture, so the right setting is the one to confirm before it goes up on the wall; flipping it at the bench is far easier than reaching up to the diffuser later. The three settings cover a warm reception or entrance, a neutral working area and a cool service or storage space, from the same fixture, so a single SKU serves more than one area on the same project without a different unit for each.

What it is not

This is the standard on/off version of the square bulkhead. It switches with the circuit, a wall switch, a timer or an external sensor. If the position needs dimming, motion sensing or an emergency hold on a power cut, that is a different variant of the same square housing with a different internal driver, so it is the one to order for that job. The body, the mounting and the diffuser face are the same; only the driver inside changes.

Certifications and warranty

The fixture carries SAA, CE and RoHS certification. SAA covers the Australian and New Zealand markets. The warranty is three to five years depending on the region and the distributor terms, so it is worth confirming which applies before the install.

Contenido de la caja

Each unit ships as a single bulkhead with the driver built in, the plain diffuser fitted, the mounting hardware and the terminal block ready to wire. The colour temperature is the setting you confirm at order, because the switch is inside the body and the housing is sealed when it leaves the factory. No separate supply, controller or transformer is packed with it; the fixture is ready to wire direct to the circuit when it arrives.

Why do buyers pick the ILED-BH-R275 S over the alternatives? Here is what we hear from customers:

The square face suits the space. A 270×270mm square sits flush against a flat wall or lines up with a grid ceiling in a way a round housing does not. That cleaner line is why it gets specified for a modern facade or a ceiling of square tiles.

The plain face is the brightest face. Of the four faces in the square series, the plain diffuser lets the most light out. Where output matters, this is the face to use; the gridded and shrouded faces are for when glare control matters more.

IK10 for the rough positions. The die-cast aluminium body carries the IK10 impact rating, the highest level in the lighting scale. That is what keeps it in car park columns and loading bays, where a standard fixture would not survive the traffic.

Two outputs, one body. The 15W and 18W share the same housing and mounting, so a project can mix them on the same wall.

Set the colour at the bench. The 2800K, 4000K and 6500K switch is inside the body; set the right temperature before the fixture goes up.

The ILED-BH-R275 S is the square, plain-faced bulkhead, used where the 270×270mm face suits the architecture and the plain diffuser is the face that needs to put out the most light.

Office corridors and back-of-house areas. The square face lines up with the grid ceiling and the linear layout of a modern corridor, and the plain diffuser is the face that carries the most light down the length of it. The 3CCT switch lets a warm reception and a cooler service corridor run from the same fixture.

Car park columns and loading bays. These positions take impact and washdown together. The IK10 die-cast aluminium body is what holds up to vehicle doors and loading traffic, and the IP65 seal handles the water. The square face sits flush against the flat concrete of a column in a way a round housing does not.

Warehouse aisles and factory walkways. The 18W plain face is the one that carries a wide aisle with fewer fixtures, and the IK10 rating is what keeps it in a position where forklifts and goods handling pass it.

School and college walkways. High-traffic student positions need the IK10 impact rating to hold up to the wear, and the square face suits the clean lines of a modern building. The 3CCT switch covers a warm entrance and a cooler corridor from the same unit.

Facade and entrance lighting. A covered entrance, a canopy or a facade wall position, where the IP65 seal and the IK10 rating keep the fixture in service.

A few things to check before ordering:

Diffuser selection. Four variants are available from the same housing: Plain for maximum output, Grille Crossing (GL) for a softer diffuse pattern, Eyelid Half Moon (EL) for directional wall-washing or facade grazing, and Crossing (TL) for balanced spread with partial glare control. Confirm the required pattern before ordering — the diffuser is factory-fitted and cannot be swapped after installation.

Wattage selection. The 15W version delivers 1400 lumens; the 18W version delivers 1700 lumens. Choose based on the illumination level required for the space — 15W for narrower corridors and low-traffic areas, 18W for wider walkways and higher-traffic positions.

Colour temperature. Three fixed settings are available at installation: 2800K warm white, 4000K neutral and 6500K cool white. Set the switch before closing the diffuser — it cannot be changed after installation.