Square, Surface-Mounted, Rimless —
UP20S Skips the Cut-Out Too
UP20S is the square version of our surface-mounted rimless ceiling light — no trim ring, no hole to cut. Its aluminum base plate screws straight onto the ceiling surface, which works on concrete slabs, fire-rated ceilings and retrofit ceilings where cutting isn’t an option, while the square profile matches a square grid layout. The SMD light engine reaches up to 110LM/W efficacy — well above the 70-80LM/W typical of a standard downlight — with a 15°–45° beam angle for more directional control. Offered in 18W–48W, with OEM/ODM support for importers, distributors and lighting contractors.
Datasheet at a Glance
Everything a buyer checks first — shape, mounting type, materials and optics — before requesting samples. Wattage-specific output figures are listed further down.
A No-Cut Square Ceiling Light With a Rimless Finish
A square surface mounted rimless LED ceiling light for concrete ceilings and retrofit renovation solves two problems at once: matching a square ceiling grid layout, and installing without cutting into a slab you can’t — or shouldn’t — drill through.
Rimless, Low-Profile Finish
No raised trim ring around the cover — even mounted on the surface, UP20S keeps a slim, clean-edged look, and the square trim suits a square ceiling grid or fixture layout.
No Cutting Required
Screw-mount installation onto the ceiling surface — no hole cutting, no recess depth to plan for, and no risk of hitting rebar or conduit inside a concrete slab.
Up to 110LM/W Efficacy
The 36W and 48W versions reach 110LM/W, ahead of the 70-80LM/W typical of a standard SMD downlight — more light output per watt drawn on the circuit.
15°–45° Beam Angle
A narrower beam range than most flat panel lights, giving more directional control over where the light lands, even from a surface-mounted position.
What’s Inside the Fixture
Three components a technical buyer usually asks about before approving a spec sheet.
Plastic Cover
A plastic front cover diffuses the SMD source for even output while keeping the visible face free of a raised trim ring, for the rimless look.
SMD Chip
The SMD light source sits directly behind the cover, delivering the fixture’s rated efficacy of up to 110LM/W depending on wattage.
ALU Base Cover
An aluminum base plate on the rear handles heat dissipation and screws flush to the ceiling surface — no recess or cutting required.
Wattage & Output Comparison
UP20S is available in 18W, 24W, 36W and 48W. As a surface-mounted fixture there is no cut-out size to plan for — select by required overall footprint and target illuminance.
18WL120×W120mm
24WL170×W170mm
36WL220×W220mm
48WL300×W300mm
| Power | Efficacy | Luminous Flux | PF/DF | Beam Angle | Overall Size |
|---|---|---|---|---|---|
| 18W | 100 LM/W | 1800 LM | 0.5/0.7 | 15°–45° | L120×W120×H42mm |
| 24W | 100 LM/W | 2400 LM | 0.5/0.7 | 15°–45° | L170×W170×H42mm |
| 36W | 110 LM/W | 3960 LM | 0.9/0.9 | 15°–45° | L220×W220×H42mm |
| 48W | 110 LM/W | 5280 LM | 0.9/0.9 | 15°–45° | L300×W300×H42mm |
What You’ll Need for a Sourcing Decision
The details that usually come up between a first sample request and a container order. Exact figures depend on wattage, CCT mix and destination — confirm with our sales team for a formal quotation.
Samples
Pre-production samples available for testing and photometry verification prior to bulk order confirmation.
OEM / ODM
Custom housing color, packaging branding and CCT selection available for private-label programs.
Lead Time
Typical production lead time runs from sample confirmation to shipment; exact scheduling depends on order volume and season.
Packaging & Shipping
Export-standard carton packaging with drop-test protection; FOB/EXW/CIF terms available on request.
Master Carton Dimensions by Wattage
For container load planning — confirm units per carton and total container quantity with our sales team for your order size.
Where UP20S Is Typically Specified
Best suited to ceilings where recessed installation isn’t an option — concrete or solid slabs, retrofit renovation, and layouts where a square fixture needs to align with an existing square grid.
Hospitality
Residential
Offices
Retail & Malls
Retrofit Renovation
Corridors
Questions Buyers Usually Ask
Is there a square LED ceiling light that installs without cutting the ceiling?
Yes — UP20S is built for exactly that. Its aluminum base plate screws directly onto the ceiling surface, while the plastic cover still sits without a raised trim ring for a clean, low-profile look. It’s a common approach for concrete slabs, fire-rated ceilings and retrofit jobs where a square fixture is needed.
What’s the difference between UP20S and the recessed UP7S?
Same rimless design philosophy and similar light engine, but UP20S mounts on the ceiling surface instead of recessing into a cut hole. Choose UP7S when you can cut a hole and want a fully flush finish; choose UP20S when the ceiling can’t be cut.
What’s the difference between UP20S and the round UP20R?
Same light engine, mounting method and efficacy — the difference is purely the trim shape, so pick whichever matches your project’s ceiling grid or fixture layout.
Is UP20S dimmable?
The standard version is non-dimmable. A dimmable driver can be arranged as a custom option — let us know your dimming protocol (TRIAC, 0-10V, DALI) when requesting a quote.
Do you support OEM/ODM and small trial orders?
Yes — branding, housing color and CCT can be discussed for private-label programs. Contact our sales team with your target quantity and we’ll confirm MOQ, sample lead time and pricing.
What payment terms and trade terms are available?
T/T and L/C are commonly used, with FOB, EXW or CIF shipping terms depending on your destination port. Get in touch for a formal proforma invoice.
Request a Quotation for UP20S
Reach out for the full datasheet and FOB/EXW pricing by wattage and order quantity.
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