What's the visual difference between the NLP-4545's diagonal wash and a straight-down cove?

A straight cove profile typically throws light in one direction only, usually up onto the ceiling. The NLP-4545's face sits at a 45-degree angle in the corner, so the same light source fans out across two surfaces at once — the ceiling and the wall just below it. The visual result is a softer, wider glow at the junction rather than a single sharp line on one surface.

Does the black powder coat finish change the light output?

No. The light output comes entirely from the LED strip and diffuser inside the channel — the powder coat finish only affects the visible profile body, not the internal optics. Both the white and black powder coat versions use the same PC diffuser and produce identical light output; the choice is purely about how the profile line reads against the ceiling or wall colour.

Can the NLP-4545 be mitred for internal and external corners?

Yes. The profile can be cut at 45 degrees on site to form clean mitred joints at both internal corners (where two walls meet) and external corners (room bumps or columns), allowing the diagonal light line to continue unbroken around complex room shapes rather than stopping at every direction change.

How many metres can run continuously before a joint is needed?

The profile ships in standard lengths and is joined using inline connectors for longer runs. There is no practical limit to total run length as long as the LED strip's voltage drop is managed with appropriately placed power feed points — for most residential and commercial rooms, a single power injection point per 8-10 metre run keeps brightness even end to end.

Is the diffuser cover removable for cleaning or strip replacement?

Yes. The PC diffuser clips onto the profile body and can be unclipped by hand without tools, giving direct access to the LED strip inside. This makes routine cleaning, dust removal, or a future strip swap straightforward without needing to unmount the profile itself from the corner.

What LED strip density gives the smoothest, dot-free wash?

Higher LED density strips (more LEDs per metre) generally produce a smoother wash with less visible dotting through the diffuser, especially at close viewing distances. For most cove applications at typical ceiling heights, a mid-to-high density warm white or tunable white strip paired with the opal PC diffuser gives an even, seamless line with no visible hot spots.

NLP-4545 Corner Profile | The Corner That Disappears Into Light | Nucleo ...

Every Room Has One Hard Edge

The NLP-4545 turns the wall-ceiling corner from a hard line into the room's softest feature

Every interior has a line where the wall stops and the ceiling begins — usually the least considered edge in the room. The NLP-4545 is a compact 45.2 x 45.2mm triangular aluminium extrusion built to occupy that exact edge and change what it does. Instead of a hard architectural line, the corner becomes a diagonal source of soft, reflected light that reaches both the ceiling above and the wall below at once.

The profile itself all but vanishes into the geometry it sits in. A clip-on PC diffuser conceals the LED strip completely, so what the room registers is not a fixture but a quiet, continuous glow tracing the perimeter. Available in white or black powder coat to match the ceiling or wall it's mounted against, the NLP-4545 is built to be specified and then forgotten — until the lights come on.

What the Diagonal Face Gives You

Six things a compact 45-degree corner profile does differently

True 45-Degree Emission

The diffuser face sits at a diagonal, so a single LED channel reaches both the ceiling and the wall beneath it in one continuous wash.

Profile Reads as Invisible

At 45.2 x 45.2mm, the body sits low in the corner, visually minimal against the ceiling line — the light is what's noticed, not the fixture.

White or Black Powder Coat

Choose the finish that recedes into the ceiling or wall colour scheme — both use the identical internal channel and diffuser.

Clip-On Diffuser

The PC cover clips over the channel without tools, giving quick access for cleaning or a future LED strip change.

Mitred at Any Corner

Cuts cleanly at 45 degrees on site, so the light line continues unbroken around internal corners, external corners, and columns.

Runs Without Visible Joints

Inline connectors keep long perimeter runs electrically and structurally continuous, with power injection points placed to hold brightness even.

One Angle, Two Surfaces

A straight cove profile lights one surface. The NLP-4545's diagonal face means the same LED strip reaches the ceiling and the wall below it simultaneously, from a single channel and a single fixing line. There's no second profile to plan, no second cut list — just one diagonal source doing the work of two, disappearing behind its own diffuser the moment it's switched on.

Surface Mount, Same-Day Install

The NLP-4545 fixes straight onto the existing corner with screws or adhesive clips — no ceiling cutout, no plasterboard reveal, no specialist trade. Seat the LED strip, snap the diffuser cover into place, and the diagonal wash is live. A full room perimeter is typically fixed and lit within a single working day.

Where a Diagonal Corner Line Earns Its Place

Spaces where a quiet perimeter glow does more than a visible fixture would

Boutique Hotel Rooms

Perimeter diagonal wash sets the tone the moment a guest opens the door.

Home Theatres & Media Rooms

Low-glare bias light along the ceiling edge that dims without competing with the screen.

Executive Boardrooms

An unbroken perimeter line keeps the room glare-free for long presentations and calls.

Fine-Dining Restaurants

Warm diagonal glow at the ceiling edge builds intimacy without a single visible downlight.

Yoga & Meditation Studios

Fully indirect, shadow-free light supports the calm the practice space is built for.

Retail Boutiques

Perimeter cove frames the shell of the store, leaving spotlighting to carry the merchandise.

Duplex Staircases & Landings

A continuous mitred run follows the stair void, lighting treads and walls in one line.

Banquet & Event Venues

RGBWW-compatible channel lets the perimeter line shift colour scene to scene through an event.

Frequently Asked Questions

Installation and specification questions on the NLP-4545

A straight cove profile typically throws light in one direction only, usually up onto the ceiling. The NLP-4545's face sits at a 45-degree angle in the corner, so the same light source fans out across two surfaces at once — the ceiling and the wall just below it. The visual result is a softer, wider glow at the junction rather than a single sharp line on one surface.
No. The light output comes entirely from the LED strip and diffuser inside the channel — the powder coat finish only affects the visible profile body, not the internal optics. Both the white and black powder coat versions use the same PC diffuser and produce identical light output; the choice is purely about how the profile line reads against the ceiling or wall colour.
Yes. The profile can be cut at 45 degrees on site to form clean mitred joints at both internal corners (where two walls meet) and external corners (room bumps or columns), allowing the diagonal light line to continue unbroken around complex room shapes rather than stopping at every direction change.
The profile ships in standard lengths and is joined using inline connectors for longer runs. There is no practical limit to total run length as long as the LED strip's voltage drop is managed with appropriately placed power feed points — for most residential and commercial rooms, a single power injection point per 8-10 metre run keeps brightness even end to end.
Yes. The PC diffuser clips onto the profile body and can be unclipped by hand without tools, giving direct access to the LED strip inside. This makes routine cleaning, dust removal, or a future strip swap straightforward without needing to unmount the profile itself from the corner.
Higher LED density strips (more LEDs per metre) generally produce a smoother wash with less visible dotting through the diffuser, especially at close viewing distances. For most cove applications at typical ceiling heights, a mid-to-high density warm white or tunable white strip paired with the opal PC diffuser gives an even, seamless line with no visible hot spots.

NLP-4545 Corner Profile | The Corner That Disappears Into Light | Nucleo ...

NLP-4545 The Corner That
Disappears Into Light

Every Room Has One Hard Edge