Wall Wash-D55 LED Downlight Square Trimless 5-8W

What is the Wall Wash-D55 LED Downlight Square Trimless and where is it specified?

At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we present the Wall Wash-D55 LED Downlight, a compact and powerful solution for sophisticated architectural lighting projects. This square, trimless fixture is engineered to disappear into the ceiling, creating a clean, 'plaster-in' finish with no visible bezel. Its primary function is to deliver a smooth, uniform wash of light across vertical surfaces, transforming plain walls into feature elements, enhancing textures, and creating a sense of depth and space. With a discreet 55x55mm aperture, the D55 is available in 5W and 8W configurations, offering a balance of performance and energy efficiency. The integrated 25° adjustability allows for precise aiming, making it versatile enough for both true wall washing and accent lighting in high-end retail, hospitality, and corporate environments across the EU, US, and Middle East.

Photometric and electrical specification

The Wall Wash-D55 series is built to meet demanding international standards. Our component selection and engineering focus on delivering consistent, high-quality light with maximum reliability. Full IES and LDT photometric files are available for lighting design simulations in software such as DIALux, ensuring predictable results for your project.

Parameter	Specification	Standard	Notes
Correlated Color Temperature (CCT)	2700K, 3000K, 3500K, 4000K, 5000K, 6500K	ANSI C78.377	3-Step MacAdam Ellipse (SDCM <3) for superior color consistency.
Color Rendering & Fidelity	CRI 80+, 90+, 95+, 98+ / TM-30 Rf92, Rg100	CRI (CIE 13.3), TM-30-18	High-fidelity options (CRI>95) are ideal for museum and retail applications.
Unified Glare Rating (UGR)	<19	EN 12464-1	Achieved with deep-recessed LED source and quality optics for visual comfort.
Beam Angle & Optics	15°, 24°, 36°, 60° (Symmetrical)	-	Asymmetrical wall wash lens available on request for large projects.
Power & Luminous Efficacy	5W (~450lm), 8W (~720lm) / 80-130 lm/W	ErP (EU) 2019/2020	System efficacy depends on CCT, CRI, and driver selection.
LED Chip Brand	Bridgelux, Citizen, CREE, Philips, Luminus, Samsung, Osram	LM-80	Proven lifetime and performance from industry-leading manufacturers.
Driver Brand & Control	Tridonic, Mean Well, Osram, Philips, TCI, BOKE	DALI-2, IEC 62386	Non-dim, TRIAC, 0/1-10V, DALI, DALI-2 DT6/DT8, Zigbee, Casambi options.
Housing & Finish	ADC12 Die-cast Aluminium Body	-	Standard Matt White (RAL9016) and Matt Black (RAL9005). Custom RAL on request.
IP Rating	IP20	EN 60529	Suitable for indoor dry locations only.
Certifications & Warranty	CE, RoHS, ErP, ISO9001:2015	-	5-year comprehensive system warranty.

Which spaces is it designed for?

The D55's strength lies in its ability to integrate seamlessly while performing a critical lighting task. It elevates environments by focusing on walls, turning them from simple dividers into active parts of the architectural experience.

How can this fixture enhance a high-end retail or boutique environment?

In a luxury retail setting, controlling the customer's focus is paramount. A row of D55 downlights can create a luminous backdrop for high-value merchandise, drawing the eye to shelving or displays along the perimeter. Using a high CRI >95 option with a 3000K or 3500K CCT ensures that the colors of fabrics, leathers, and cosmetics are rendered accurately and vibrantly. The trimless design contributes to a minimalist ceiling aesthetic, preventing visual clutter and keeping the attention on the products. A typical layout might involve spacing fixtures 0.8m apart and 0.6m from the wall to achieve vertical illuminance levels of 300-500 lux on the target display.

What is the best way to use the D55 in a modern hotel lobby or corridor?

For hospitality, the D55 creates ambiance and aids in wayfinding. In a hotel lobby, washing a feature wall of stone, timber, or branded artwork creates a dramatic and welcoming first impression. In corridors, a continuous scallops of light can guide guests while making the space feel wider and safer. The 25° tilt is crucial for aiming light precisely. We recommend a warm CCT of 2700K paired with a Dim-to-Warm (DTW) driver, allowing the light to transition from a functional 2700K at full brightness to a cozy 1800K glow when dimmed, perfect for evening scenes controlled via a DALI or Casambi system.

Is the Wall Wash-D55 suitable for office meeting rooms or collaborative spaces?

Yes, it's an excellent choice for modern human-centric office lighting. By washing one or more walls, it balances the overall room brightness, mitigates the 'cave effect' often caused by solely using task lighting, and enhances visual comfort. When used to illuminate a whiteboard or presentation wall, it provides even, glare-free light. For these applications, a neutral 4000K CCT and a UGR<19 optical configuration are recommended to promote alertness and productivity. Our team can provide IES and LDT files for you to run simulations in DIALux and verify compliance with standards like EN 12464-1 before specification.

Installation, control and compliance (DALI-2 / Casambi / 0-10V, CE / RoHS / ErP)

The Wall Wash-D55 is designed for a professional 'plaster-in' installation. Each unit ships with a mounting frame that is installed before the final layer of plasterboard. The fixture body then clicks into place, and the ceiling is plastered and painted right up to the aperture for a completely seamless look. The luminaire connects to a remote driver, which can be specified for a wide range of control protocols. We offer robust solutions for DALI-2 (IEC 62386), which guarantees interoperability in smart building systems, as well as simpler 0-10V and Phase-cut (TRIAC) dimming. For maximum flexibility and retrofit projects, we support wireless controls like Casambi (BLE) and Zigbee.

All configurations are CE and RoHS certified for the European market and comply with the latest ErP ecodesign regulations. Our manufacturing process is ISO9001:2015 certified, and every fixture is backed by a 5-year warranty for peace of mind.

Customisation, MOQ and lead time

As a specialist manufacturer, we offer extensive customisation. Beyond the standard options, we can accommodate requests for specific RAL color finishes to match your interior design palette, non-standard CCTs, or specific color rendering bins for large-scale rollouts. For projects with unique requirements, custom optic development is possible.

Our Minimum Order Quantity (MOQ) for the D55 series is 100 units. The standard production lead time is approximately 20-25 working days from order confirmation and deposit payment. We manage logistics for export to key markets, including the EU, USA, and the Middle East, ensuring your products arrive safely and on schedule.

Frequently Asked Questions

Q: What is the main performance difference between the 5W and 8W versions?

A: The primary difference is lumen output. The 5W version delivers approximately 450 lumens, making it ideal for standard ceiling heights of 2.4m to 2.7m. The 8W version provides around 720 lumens, offering the increased punch needed for ceilings from 2.8m to 3.5m high or for applications requiring higher vertical illuminance levels on the target wall.

Q: Is a special mounting frame required for the trimless installation?

A: Yes, a plaster-in mounting frame is required and included with every D55 trimless fixture. This frame is installed onto the ceiling structure before the plasterboard. It provides a precise opening and a surface for the plaster to be applied against, ensuring a clean, sharp, and perfectly integrated zero-bezel finish once the ceiling is painted.

Q: Can I get this fixture with Tunable White (TW) or Dim-to-Warm (DTW) technology?

A: Absolutely. We offer both options via a DALI-2 DT8 driver or dedicated wireless control systems. The Tunable White version can typically be configured to adjust from 2700K to 6500K, allowing for human-centric lighting scenes. The Dim-to-Warm option mimics incandescent dimming, smoothly transitioning from 3000K at 100% brightness down to a very warm 1800K at minimum output.

Q: What is the typical spacing for an even wall wash effect?

A: As a general rule of thumb for achieving a smooth wash, fixtures should be placed a distance from the wall that is approximately one-third of the ceiling height. For example, in a room with a 3-meter ceiling, place the center of the fixtures 1 meter away from the wall. The spacing between fixtures should then be equal to this setback distance (1 meter apart).

Request IES files and a quotation

To move forward with your project, please contact our engineering team to request detailed datasheets, IES/LDT photometric files for your lighting calculations, and project-specific pricing. We can provide samples and help you select the ideal configuration for your application. At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we are ready to support your project from specification to delivery.