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The SL-CL5U recessed LED grid downlight is a seven-configuration family that combines one, two or three independently aimable COB heads inside a clean square or rectangular black housing. The 2026 indoor catalog lists 10W, 2 x 10W, 15W, 2 x 15W, 18W, 2 x 18W and 3 x 18W versions, allowing one visual language to cover focused accents, twin-direction lighting and longer corridor or retail layouts. Each head uses a 15, 24 or 38-degree optic in the current catalog, while the website gallery shows a 270-degree gimbal movement for directional commissioning.
Key Difference: This LED Downlight category page is the seven-model selection hub for SL-CL5U: compare every single, double and triple-head configuration in one table before choosing the ceiling module. The SL-CL5U Square Downlight page should instead focus on square geometry, ceiling rhythm and architectural appearance. The SL-CL5U Surface Mounted page conflicts with the 2026 catalog's cutout data and recessed installation classification; recategorize or redirect it rather than publishing another near-duplicate.
Single Double Triple Head
Specify one, two or three aimable COB modules in a coordinated square housing family.
10W to 3 x 18W Range
Match the number of heads and total output to corridors, display zones, counters or feature walls.
270° Gallery Adjustment
The current product gallery shows each gimbal moving through 270 degrees for individual aiming.
15° 24° 38° Optics
Use the narrow beam for emphasis and wider options for a larger target or smoother spacing.
CRI 90 Catalog Standard
The 2026 catalog specifies Ra90 for color-sensitive hotel, retail and display environments.
Four Control Choices
On-off, DALI, 0/1-10V and Triac are checked in the catalog; confirm the final driver and interface.
The 2026 indoor catalog, page 41, is the primary specification source for this update. It classifies SL-CL5U as an embedded downlight with IP20 protection, COB light sources and seven size rows. The website gallery broadly agrees on the power family, IP20 mark and head count, but differs on beam angle, CCT, CRI, efficacy and voltage. Those conflicts are not hidden; the catalog values below take priority while the final order still requires an approved drawing and driver specification.
| Power / Heads | Catalog Size | Catalog Cutout | Beam |
|---|---|---|---|
| 10W / single | L47 x W47 x H100 mm | 52 x 52 mm* | 15° / 24° / 38° |
| 2 x 10W / double | L140 x W47 x H100 mm | 102 x 52 mm* | 15° / 24° / 38° |
| 15W / single | L77 x W77 x H140 mm | 82 x 82 mm* | 15° / 24° / 38° |
| 2 x 15W / double | L158 x W77 x H140 mm | 165 x 82 mm* | 15° / 24° / 38° |
| 18W / single | L97 x W97 x H140 mm | 102 x 102 mm* | 15° / 24° / 38° |
| 2 x 18W / double | L197 x W97 x H140 mm | 202 x 102 mm* | 15° / 24° / 38° |
| 3 x 18W / triple | L297 x W97 x H140 mm | 302 x 102 mm* | 15° / 24° / 38° |
*The published cutout is 5-7 mm larger than the corresponding listed face width or length in every row. This may mean the `Size` column describes an inner module rather than the visible trim, or the two labels need correction. Do not release these openings to a ceiling contractor until SYNNO issues an approved dimension drawing.
| Parameter | 2026 Catalog Value |
|---|---|
| Model | SL-CL5U |
| Installation | Embedded / recessed grid downlight; verify the mounting drawing |
| Light Source | COB |
| LED Chip Efficacy | 100-120 lm/W |
| Whole-Light Efficacy | 70 lm/W |
| CRI | Ra90 |
| CCT | 2700K / 3000K / 4000K / 5000K / 6000K |
| Voltage Options | AC100-265V / AC220-240V / DC24V |
| Controls Checked | On-off / DALI / 0/1-10V / Triac; confirm the final driver and interface |
| Protection | IP20 indoor; model-specific IEC 60529 report required for a formal claim |
| Material | Aluminum body; catalog also states plastic diffuser |
| Operating Temperature | -25 to +50°C |
The 2026 catalog places SL-CL5U in the embedded downlight section and gives a cutout for every configuration. The current gallery also shows an eight-step sequence in which the housing is inserted into an opening between ceiling slats, secured, connected to a driver and aligned with the finished surface. These two sources contradict the page field `Surface Mounted` and the old description's statement that no ceiling cutting is needed.
The dimension anomaly must be resolved before construction. In every row the published opening is slightly larger than a listed face dimension. Ask engineering for a drawing that clearly labels visible trim, body, aperture, spring or bracket span and installation opening. The ceiling contractor should work from that approved drawing, not from the marketing table. Also coordinate the 100 mm or 140 mm housing depth, driver access, cable bend and ventilation clearance.
The 10W, 15W and 18W versions create one controlled accent within a compact square opening. Use a single head where a display, counter, artwork or seating feature needs one visual focus. The three body scales let a project keep the same architectural language while changing output and ceiling depth.
The 2 x 10W, 2 x 15W and 2 x 18W housings place two independently aimable beams in one rectangular cutout. One head can address a wall or display while the second supports circulation or another object. The layout reduces the number of separate ceiling openings and keeps paired accents aligned.
The 3 x 18W version extends the same system into a long module for corridors, retail bays and hospitality zones. Three heads can follow a linear display or be aimed at separate targets, but the total electrical load, heat and 302 x 102 mm published opening require early coordination with the ceiling system.
The website gallery shows a 270-degree adjustment around each gimbal. That movement is gallery-derived rather than printed on the 2026 catalog page, so verify the mechanical range on a sample before promising it in a project submittal. Each head can be commissioned toward a display, wall, counter or circulation path instead of forcing all light straight down.
The newer catalog lists 15, 24 and 38-degree optics; the older gallery shows 15, 24 and 36 degrees. This description follows the 2026 value of 38 degrees and flags the website graphics for replacement. Use 15 degrees for a concentrated highlight, 24 degrees for controlled accent lighting and 38 degrees for a broader target. Request an IES or LDT file for the exact power and optic before calculating beam diameter, spacing or illuminance.
The 2026 indoor catalog specifies Ra90 and five CCT steps: 2700K, 3000K, 4000K, 5000K and 6000K. This differs from the gallery's four-step list and the page's mixed 2700K, 3500K, 4100K, 5000K and 6000K fields. The catalog list is used here, but the selected CCT must still appear on the order specification and sample approval.
Warm 2700K and 3000K suit hotels, restaurants and timber finishes. Neutral 4000K works for many offices, corridors and retail spaces; 5000K and 6000K create a cooler appearance for projects that explicitly need it. The gallery displays CREE, OSRAM, EPISTAR, Bridgelux and LUMINUS logos as customizable sources. Treat them as options rather than a promise that every unit uses one of those brands.
The catalog checks on-off, DALI, 0/1-10V and Triac across all seven rows. That indicates configurable control options, not one driver that performs every protocol. State the destination voltage, control system, dimming range and flicker criterion in the quotation. Confirm whether the 0/1-10V driver is source or sink and whether the proposed DALI driver has the registration required by the project.
A DALI icon does not prove DALI-2 registration, and the page's generic `Support Dimming: Yes` is not detailed enough for procurement. The approved driver model should appear on the sample, submittal and production order. Do not claim compatibility with a named wall control or building system until the final combination has been checked.
The gallery shows an aluminum enclosure with ventilation slots and describes a thickened aluminum radiator using air convection. That construction supports passive heat transfer from the COB and driver area, but it still needs the ceiling clearance and airflow stated in the approved drawing. The 2026 catalog lists a whole-light efficacy of 70 lm/W, replacing the website's unsupported 90-95 lm/W claim.
Both the catalog and parameter graphic mark IP20. The page field says IP44, so the product must be treated as a dry-indoor luminaire unless a model-specific IEC 60529 report establishes another rating. It should not be presented as suitable for bathrooms, wet zones or dusty service areas based on the current evidence. The CE mark shown in the gallery is also not a substitute for the model-specific Declaration of Conformity and applicable LVD/EMC reports.
Hotel corridors - combine double or triple modules with aligned ceiling openings and aim individual heads toward doors, walls or circulation.
Retail displays - use Ra90 and narrow optics to emphasize merchandise while keeping the ceiling composition orderly.
Showrooms and galleries - redirect each gimbal as exhibits change and select the beam from photometric data.
Offices and meeting rooms - pair downward task support with a second head aimed at a presentation or feature wall.
Restaurants and lounges - use warm CCTs and single or paired accents over tables, counters and artwork.
Slatted ceilings - coordinate the rectangular opening, module length and support bracket with the ceiling system before fabrication.
Use these observed SYNNO pages to compare waterproof, trimless, adjustable and higher-power alternatives without guessing URLs.
SYNNO Lighting homepage - company and complete product catalogue.
Downlight collection - parent category for ceiling luminaires.
LED Downlight collection - this page's current third-level category.
Square Downlight collection - square and rectangular architectural alternatives.
Recessed Downlight collection - products classified by ceiling installation.
SL-CL2F IP65 surface-mounted downlight - compare a genuine no-cutout mounting method.
SL-CL3I IP65 deep recessed downlight - choose a protected deep-cone alternative.
SL-CL2P high-power recessed downlight - compare higher-output single-aperture options.
SL-CL2K adjustable trimless downlight - select a borderless round adjustable fixture.
SL-CL18A IP54 recessed downlight - compare a 2026 catalog-listed protected model.
Hotel lighting design guide - specifies SL-CL5U for corridor single, double and triple-head layouts.
Fixed and adjustable downlight guide - compare ceiling formats and movement types.
2026 Catalog-Listed Family
The current indoor catalog identifies seven SL-CL5U rows, making this an active documented product family rather than a legacy webpage claim.
One Family for Three Layouts
Coordinate single, double and triple modules with the same black grid-light language.
Drawing-Based Customization
SYNNO publishes drawing-based and full-customization capabilities; record the approved optic, driver, finish and labeling in the order specification.
Verified Company Evidence
Jiangmen Synno Lighting Co., Ltd. was founded in 2012; its Alibaba supplier profile records SGS onsite verification dated 28 December 2025.
Is SL-CL5U surface mounted or recessed? The 2026 catalog classifies it as embedded and supplies a cutout for every row. The website's surface-mounted field conflicts with that evidence, so obtain the approved mounting drawing before specifying it.
Why does the cutout exceed the listed size? The catalog and gallery both show openings 5-7 mm larger than a listed face dimension. The labels may refer to different parts of the housing. Do not issue those figures for construction until engineering clarifies the drawing.
How many heads are available? The family includes three single-head, three double-head and one triple-head configuration: 10W, 2 x 10W, 15W, 2 x 15W, 18W, 2 x 18W and 3 x 18W.
Which beam angles are current? The 2026 catalog lists 15, 24 and 38 degrees. The older website gallery says 36 degrees, so update the image or confirm which optic remains in production.
Is the product IP44? No current evidence supports that page field. The 2026 catalog and gallery both mark IP20, so treat this as a dry-indoor fixture unless a model-specific IEC 60529 report states otherwise.
Can it use DALI or Triac? The catalog checks on-off, DALI, 0/1-10V and Triac. Confirm the final driver, interface and dimmer compatibility; the DALI mark does not prove DALI-2 registration.
What should an enquiry include? Send head count, power, approved cutout drawing, beam, CCT, CRI, input voltage, control protocol, housing color, quantity, compliance documents, packaging and destination.
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