Recessed Linear LED Lighting Fixture Commercial and Residential

The ILED-LL-A-1 is a recessed linear LED lighting fixture designed for integration into suspended ceilings and custom architectural elements. It is distinguished by its ultra-slim 35 mm housing height — one of the shallowest profiles in the iLed linear range — and its fully customizable length, allowing installers to match any room dimension without visible joints. The LL-A-1 belongs to the broader LL-A family, which also includes taller 75 mm and 90 mm depth variants; the A-1 model is the choice where ceiling reveal is limited or a near-flush finish is required.

Tech specs

• LED luminous efficacy: >100 lm/W — 10W/12W (35 mm width), 20W/30W (55 mm width), up to 80W/8000 lm (80 mm width)
• Housing widths: 35 mm (LL-A 3575), 55 mm (LL-A 5575), 80 mm (LL-A 8090); all share 35 mm height for the A-1 recessed variant
• Custom length: 1000 mm, 1500 mm, 2000 mm standard; bespoke lengths available on request
• Beam angle: 120° wide, uniform distribution through PC diffuser
• Color options: Warm white, neutral white, cool white, tunable CCT (2700–6500K), RGB, RGBW, RGB+CCT
• CRI: >82 standard; >92 available on white/CCT variants
• Input voltage: 220–240VAC / 110–277VAC dual-range (wide voltage)
• Power factor: >0.9
• IP rating: IP42 — indoor use only; protected against solid objects >1 mm and vertically dripping water
• Electrical classification: Class II (double-insulated, no earth required)
• Control protocols: DALI2, DMX512, SPI
• Body & diffuser: Extruded aluminum housing with frosted PC diffuser; white or black finish
• Certifications: CE, RoHS, SAA
• Warranty: 3–5 years

Slim 35 mm profile and recessed installation

The A-1’s defining feature is its 35 mm housing depth, significantly slimmer than the standard LL-A 75 mm and 90 mm depth variants. This makes it ideal for installations where ceiling cavity space is restricted — false ceilings with limited drop, retrofit projects where the existing ceiling plane must be preserved, or spaces where a minimal visual presence is a design priority. The fixture mounts recessed into the ceiling plane, with only the 35 mm deep housing and diffuser visible from below. Surface mounting is supported through optional brackets for soffit edges, under-cabinet surfaces, or wall-mounted applications.

Custom length and control options

Unlike fixed-length linear fixtures, the ILED-LL-A-1 can be ordered in any length between 1000 mm and 2000 mm, with bespoke cuts available for non-standard spans. This allows a single corridor, showroom aisle, or feature ceiling to be lit by one continuous run of light with no visible joints. Multiple A-1 units can be daisy-chained using DALI2 or SPI protocol, enabling synchronized control across large installations.

The A-1 is available in five color families: single white (fixed CCT), tunable CCT (2700K–6500K adjustable), RGB (full colour), RGBW (colour plus white channel), and RGB+CCT (colour plus independently adjustable white). RGB and RGBW variants are controlled via DMX512 or SPI, suitable for accent lighting and architectural highlighting. White and CCT variants use DALI2 for dimming and setting, integrating into building management systems. CRI options span >82 for general commercial use and >92 for retail and hospitality applications where colour accuracy is critical. The 120° beam angle provides wide, even coverage, minimizing hot spots between adjacent fixtures.

Why do buyers pick the ILED-LL-A-1 over other recessed linear options? Here is what we hear from customers:

35 mm — the slimmest profile in the LL-A family. The A-1’s housing depth is less than half that of the standard LL-A 75 mm and 90 mm variants. For ceiling cavities with limited drop or retrofit projects where the existing ceiling plane must be preserved, this shallow depth is the deciding factor.

Custom length up to 2000 mm — no visible joints. Fixed-length linear fixtures leave a visible seam where two units meet. The A-1 is supplied in custom lengths from 1000 mm to 2000 mm, so long corridors and feature ceilings can be lit by a single continuous run with no break in the light line.

DALI2, DMX512 and SPI — one fixture for any control system. Whether the project uses a building management system (DALI2), a stage lighting console (DMX512), or a custom IoT controller (SPI), the A-1 integrates without additional gateways or protocol converters. RGB and RGBW colour variants are DMX512/SPI controlled; white and CCT variants use DALI2.

Office ceilings and co-working spaces. — The 35 mm recessed profile sits flush with false ceilings, eliminating visual clutter in open-plan offices. DALI2 control allows zoned dimming tied to occupancy and daylight sensors, reducing energy use in partially occupied areas. Choose the 55 mm width (20–40W) for general office illumination; step up to 80 mm width (40–80W) where higher light levels are needed.

Retail stores and showrooms. — Continuous linear runs guide customer movement through the space, and the >92 CRI option renders merchandise colours accurately. RGBW variants add dynamic colour accents to feature walls or promotional displays, controlled via DMX512 from a central lighting console.

Hotels and hospitality corridors. — Recessed linear strips create a sense of length and direction. Tunable CCT versions allow different moods — warm white for evening check-in, cooler daylight for morning — while SPI control enables scene recall across entire floors.

Educational institutions and libraries. — Uniform 120° beam distribution eliminates shadows on desks and reading tables. DALI2 integration supports scheduling and daylight harvesting, cutting energy costs in classrooms and study areas that follow predictable occupancy patterns.

Residential interiors and feature ceilings. — Homeowners specify the A-1 for kitchen under-cabinet lighting, living room cove features, and bedroom ambient strips. The RGB+CCT option allows a single fixture to serve both task lighting (bright white) and mood lighting (warm colour) depending on the time of day.

Mounting style confirmation. — The A-1 is designed for recessed ceiling installation. Confirm the ceiling cavity can accommodate the 35 mm housing depth, including space for the integral driver and DALI2 wiring. Surface-mount brackets are available as an accessory.

Control protocol matching. — DALI2 is required for white/CCT dimming and building management integration. DMX512 or SPI is required for RGB, RGBW and RGB+CCT colour variants. Confirm your control system at the time of order — the driver is fixed at the factory and cannot be upgraded in the field.

Width vs wattage selection. — The 35 mm width covers 10–20W, the 55 mm width covers 20–40W, and the 80 mm width covers 20–80W. Match the width to your lumen requirement — a 35 mm unit at 20W will not deliver the same output as an 80 mm unit at 80W.

A-1 vs LL-C round tube. — The A-1 is a flat recessed linear (rectangular profile); the LL-C is a round tube linear (φ60 mm). Choose the A-1 for ceiling-recessed applications; choose the LL-C for pendant installations where 360° light output is desired.