Custom Surface Mounted LED Downlights for Commercial Projects

Slim-profile COB downlights with dual optical variants (multi-spot & wide flood) for flexible commercial lighting

● Project-Based OEM/ODM Available

● Stable Batch Quality & On-Time Delivery

● Transparent Sampling & QC Control

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CER Series LED Surface Mount Downlights — 355° Rotatable, No Cutout Required

If you’ve ever wrestled with cutting ceiling holes for recessed downlights, you know how frustrating it can be — wrong cutout size, damaged drywall, incompatible housing. The CER series solves this entirely. As a professionalgrade surface mount led downlight, it installs directly onto the ceiling with zero cutout required, while still delivering the precise directional control that commercial lighting demands. In fact, when specifiers compare led surface mounted downlight options, the CER series consistently stands out for its combination of ultra-slim profile and full rotatability. Many lighting professionals now prefer led surface mounted downlight solutions for renovation projects where ceiling access is limited.

At Zerund Lighting, we designed the CER series around two distinct optical architectures — a multi-COB ring for dramatic spot effects and a ring-shaped diffuser for soft 120° flood — giving lighting designers and specifiers real flexibility within a single product family. Whether you’re outfitting a boutique retail space, a hotel lobby, or an art gallery, the CER series gives you the tools to layer light exactly the way you want.

Browse the complete Zerund commercial downlights portfolio — recessed, surface, waterproof and smart options for every project.

Key Features

The following features define the CER Series Spotlights' superior performance, durability, and versatility for commercial lighting applications.

No Cutout, No Hassle

The most immediate advantage of the CER series is installation simplicity. Surface mount led downlights eliminate the need for ceiling cutouts, recessed housings, and the structural compromises that come with them. For existing buildings, renovation projects, or concrete ceilings where cutting is impractical, the CER installs in minutes with just a bracket and two screws. As a surface mount downlight led solution, it eliminates the most time-consuming step of traditional downlight installation.Can effectively reduce assembly costs and shorten production cycles.
355° Rotation and 45° Tilt

Directional flexibility matters enormously in commercial applications. The CER’s 355° horizontal rotation means you can aim light in virtually any direction without repositioning the fixture. The 45° vertical tilt adds another dimension of control, letting you wash walls, highlight displays, or create grazing effects on textured surfaces.This level of adjustability is what makes surface mounted led downlights like the CER series so valuable in retail and hospitality design.With 360° rotation and 180° tilt adjustment, this design is ideal for commercial spaces that require flexible beam control. Explore our architectural surface mount commercial downlight solution for retail and hospitality applications.
Dual Optical Architecture

The CER-A variant arranges multiple COB modules in a ring pattern, offering three selectable beam angles — 15°,24°, and 38°. At 15°, you get tight, dramatic spots perfect for jewelry counters or museum pieces. At 38°, the light spreads wide enough for general accent illumination. The CER-B variant abandons discrete spots entirely, using a ring-shaped optical diffuser to produce a uniform 120° flood. This creates a halo of soft ambient light around the fixture, ideal for ceiling wash in lobbies, corridors, and open-plan offices.
Ultra-Slim 40mm Profile

At just 40mm from ceiling to bottom, the CER series maintains an unobtrusive presence even in spaces with low ceiling clearance. The slim profile is achieved through careful thermal engineering — the die-cast aluminium body doubles as a heatsink, pulling heat away from the COB module without needing additional depth.
COB LED Technology

Chip-on-board (COB) LED technology delivers uniform, high-density light output from a single integrated module.Unlike SMD arrays that can show individual LED dots, COB produces a smooth, consistent beam that’s essential for professional lighting applications. The CER series uses COB modules rated at CRI>80 standard and CRI>90 high-fidelity options, ensuring accurate color rendering for retail merchandise, artwork, and interior finishes. As a COB LED downlight, the CER achieves superior uniformity compared to SMD alternatives. Every COB LED downlight module in the CER series undergoes strict lumen and chromaticity binning.
Mulit Type CCT Options

Available in 3000K (warm white), 4000K (neutral white), 5000K (cool white), and 6000K (daylight), the CER series lets you match the color temperature to your project’s atmosphere. We recommend 3000K for hospitality and residential, 4000K for office and retail, and 5000K-6000K for task-oriented or industrial environments.
Premium Aluminium Material

The housing is die-cast from high-grade aluminium, providing excellent thermal conductivity and mechanical durability. Unlike plastic-bodied surface mount downlights that can yellow or warp over time, the CER’s aluminium light body maintains its appearance and performance throughout its rated 50,000+ hour lifespan. For projects requiring premium surface mounted downlight led quality, the CER series delivers consistent thermal performance. Every surface mounted downlight led unit from Zerund undergoes 100% photometric testing.
Precision Beam Control

The CER-A’s three beam angle options (15°/24°/38°) are achieved through precision-molded lens optics. Each beam angle is engineered for a specific throw distance and coverage pattern, so you can select the right variant for your ceiling height and application without compromise.
Tool-Free Aim Adjustment

Once installed, adjusting the direction of your surface mounted led downlight requires no tools. The rotation mechanism uses a smooth detent system that holds position firmly once set, while the tilt adjustment features a friction-lock pivot that stays exactly where you position it. This tool-free adjustment is what makes surface mounted adjustable led downlight systems like the CER so efficient during commissioning.
IP20 Indoor Rating

Rated IP20 for standard indoor environments, the CER series is suitable for retail stores, offices, hotels,restaurants, galleries, and all typical commercial interiors. For wet or outdoor locations, we recommend our IP54 and IP65 rated series instead.

Slim Surface Mount Led Downlights(Only 40mm Hight)

Parameters

Feature	CER-A (Multi-Spot Ring)	CER-B (120° Flood Ring)
Model	Z030129A-10	Z030129B-10
Dimensions	φ148 × 40mm	φ148 × 40mm
Power	10W	10W
Luminous Flux	960lm	960lm
Beam Angle	15° / 24° / 38°	120°
Optical Type	Multi-COB ring spots	Ring-shaped diffuser
CCT	3000K 4000K 5000K 6000K	3000K 4000K 5000K 6000K
CRI	>80 / >90	>80 / >90
Rotation	355°	355°
Tilt	45°	45°
Material	Aluminium + Lens	Aluminium + Lens
IP Rating	IP20	IP20

Typical Applications

The CER Series Spotlights are designed for a variety of commercial and architectural environments. For commercial projects requiring high color accuracy and comfortable illumination, explore our adjustable surface downlight with uniform glow solution designed for modern interiors.With adjustable positioning and multiple beam choices, this solution provides flexible lighting control for different commercial applications. Explore our directional spotlight with 3 beam angles option for precise accent lighting. For workspaces requiring comfortable and low-glare illumination, explore our anti-glare downlights for office buildings designed for modern commercial interiors.

Entrance Hall Corridor

Patio Villa

Living Room Interior Decoration Lighting

Kitchen Island

Optical Performance

Understanding the optical difference between CER-A and CER-B is critical for proper specification:

CER-A Multi-Spot Ring: The ring of discrete COB modules creates a distinctive pattern of multiple focused spots. At 15° beam angle, each spot produces a tight, intense pool of light — ideal for highlighting small objects at close range. At 38°, the spots broaden and begin to overlap, creating a more uniform but still textured illumination pattern. The multi-spot effect is inherently dramatic and draws attention, making CER-A perfect for accent and display lighting.

CER-B 120° Flood: The ring-shaped diffuser spreads light evenly across a 120° cone, producing a smooth,shadow-minimized wash around the fixture. This is fundamentally different from a spotlight — there are no hot spots or dramatic contrast. CER-B excels at general ambient illumination where the goal is even, comfortable lighting rather than dramatic effect.

For projects that need both accent and ambient layers, mixing CER-A and CER-B within the same ceiling grid creates professional-grade layered lighting without requiring separate product families.

Customization & Project Support

Zerund Lighting offers comprehensive OEM and ODM support for the CER series:

● Private Label: The CER series can be branded with your company name, logo, and custom packaging. We work with lighting brands, distributors, and project contractors worldwide.

● Project-Specific Configuration: Large projects may require custom beam angle combinations, special finish colors, or modified electrical specifications. Our engineering team can configure the CER platform to meet your exact requirements.

● MOQ and Lead Time: Standard configurations are available with low MOQ for sampling. Volume production lead times are typically 25-35 days after order confirmation. Contact our sales team for project-specific quotes.

Common Project Questions

These answers help you quickly determine whether our manufacturing model fits your project requirements.

What is the difference between surface mount led downlights and recessed downlights?

Surface mount led downlights install directly on the ceiling surface without requiring a cutout or recessed housing. This makes them ideal for existing buildings, concrete ceilings, and renovation projects where cutting into the ceiling isn’t feasible. Recessed downlights require a hole cut into the ceiling and a housing cavity above. Functionally,both can deliver similar lighting performance — the CER series achieves 355° rotation and 45° tilt from a surface mount position, matching the directional capability of most surface mounted gimbal led downlights and gimbal recessed fixtures.
Can the CER series be used in outdoor or wet locations?

The CER series carries an IP20 rating, which is suitable for standard indoor commercial and residential environments. It is not rated for outdoor use, wet locations, or high-humidity environments like bathrooms or swimming pools. For those applications, we recommend our IP54-rated FOM series or IP65-rated NODE and CUBE series surface mount options.
What beam angle should I choose for retail versus office?

For retail environments where you want to highlight merchandise or create dramatic displays, CER-A with 15° or 24° beam angles is ideal. For office spaces requiring uniform general illumination, CER-B with its 120° flood angle provides comfortable, even lighting without hot spots. A common approach is to use CER-A for accent zones and CER-B for general areas within the same project.
Is the CER series dimmable?

The CER series is dimmable when paired with a compatible LED driver. We support TRIAC (phase-cut), 0-10V, and DALI dimming protocols. The driver is not included with the fixture and should be selected based on your dimming requirements and local electrical standards.
How does the multi-COB ring (CER-A) differ from the 120° flood (CER-B)?

CER-A uses multiple discrete COB modules arranged in a ring, each producing a focused spot of light. This creates a dramatic, textured lighting effect perfect for accent and display applications. CER-B uses a continuous ring-shaped diffuser that spreads light evenly across 120°, producing smooth ambient illumination. Think of CER-A as your spotlight tool and CER-B as your ambient wash tool.
What is the expected lifespan of these surface mounted led downlights?

The CER series is rated for 50,000+ hours of operation under normal conditions. At 8 hours of daily use, that translates to over 17 years of service life. The die-cast aluminium housing ensures effective thermal management, which is the primary factor in LED longevity.
Can I mix CER-A and CER-B in the same project?

Yes. Both variants share identical dimensions,mounting hardware, and electrical specifications. You can freely mix CER-A and CER-B within the same ceiling grid, room, or project. This is actually one of the key design advantages — use CER-B for general ambient lighting and CER-A for accent spots, creating professional layered lighting from a single product family.
What certifications do CER series surface mount led downlights carry?

The CER series meets standard international safety and performance requirements for LED luminaires. Specific certifications (CE, TUV, ENEC,SELV,etc.)vary by target market and configuration. Contact our sales team with your market requirements and we’ll provide the relevant certification documentation for your region.

Ready to Specify the CER Series?

The CER series brings professional-grade directional lighting to any ceiling — without the complexity of recessed installation. Whether you need dramatic multi-spot accents with CER-A or smooth ambient flood with CER-B, this surface mount led downlight family gives you the flexibility to design light exactly the way you envision it.

Request Product Information

Custom Surface Mounted LED Downlights for Commercial Projects

CER Series LED Surface Mount Downlights — 355° Rotatable, No Cutout Required

Key Features

No Cutout, No Hassle

355° Rotation and 45° Tilt

Dual Optical Architecture

Ultra-Slim 40mm Profile

COB LED Technology

Mulit Type CCT Options

Premium Aluminium Material

Precision Beam Control

Tool-Free Aim Adjustment

IP20 Indoor Rating

Slim Surface Mount Led Downlights(Only 40mm Hight)

Parameters

Typical Applications

Entrance Hall Corridor

Patio Villa

Living Room Interior Decoration Lighting

Kitchen Island

Optical Performance

Customization & Project Support

Common Project Questions

What is the difference between surface mount led downlights and recessed downlights?

Can the CER series be used in outdoor or wet locations?

What beam angle should I choose for retail versus office?

Is the CER series dimmable?

How does the multi-COB ring (CER-A) differ from the 120° flood (CER-B)?

What is the expected lifespan of these surface mounted led downlights?

Can I mix CER-A and CER-B in the same project?

What certifications do CER series surface mount led downlights carry?

Ready to Specify the CER Series?