X20S-D135 Modular LED Downlight 10-25W Manufacturers

What is the X20S-D135 Modular LED Downlight and where is it specified?

At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we engineer luminaires for the demanding European, US, and Middle Eastern markets. The X20S-D135 is the cornerstone of our modular downlight series, offering unparalleled flexibility for specifiers, lighting designers, and electrical contractors. This system is designed around a core 135mm diameter housing that accepts a range of interchangeable light engines and optical assemblies, covering power outputs from 10W to 25W. Its primary application is in commercial, retail, hospitality, and high-end residential projects where performance, low glare, and colour quality are paramount. The wide cutout tolerance of D110-130mm makes it an ideal solution for both new construction and refurbishment projects, allowing for easy replacement of older, less efficient fixtures without extensive ceiling modifications. With a comprehensive selection of CCTs, high CRI options up to 98+, and market-leading driver compatibility, the X20S-D135 provides a complete toolkit for creating sophisticated and compliant lighting schemes.

Photometric and electrical specification

The X20S-D135 series is built to specification-grade standards, offering a wide array of configurable options to meet precise project requirements. We provide complete photometric data, including IES and LDT files, for seamless integration into DIALux and other lighting design software.

Parameter	Specification	Standard	Notes
Optics - CCT	2700K, 3000K, 3500K, 4000K, 5000K, 6500K, Tunable White, Dim-to-Warm	ANSI C78.377	3-Step MacAdam Ellipse (SDCM<3) ensures colour consistency.
Optics - Colour Quality	CRI 80+, 90+, 95+, 98+	CRI (Ra)	TM-30 Rf ~90, Rg ~100 available for high CRI modules.
Optics - Glare Control	UGR<19, UGR<16 configurations available	EN 12464-1	Achieved with deep-set LED, black baffle, and advanced lens design.
Optics - Beam Angle	15°, 24°, 38°, 60°	FWHM	Field-changeable PC lens and reflector optic modules.
Electrical - Power	10W / 15W / 20W / 25W	-	System wattage; varies with driver and control gear.
Electrical - Efficacy	80-130 lm/W	-	Lamp efficacy. Varies by CCT, CRI, and power setting.
Electrical - Driver	Tridonic, Mean Well, Osram, Philips, TCI, BOKE, Lifud	CE, ENEC	DALI-2, 0-10V, Phase-cut (TRIAC), and non-dimmable options.
LED Chip	Citizen, Bridgelux, CREE, Philips, Luminus	LM-80	Choice of chip allows balancing cost, efficacy, and colour quality.
Housing - Material	ADC12 Die-cast Aluminium Heatsink and Trim	-	Excellent thermal management for 50,000+ hour L80 lifetime.
Housing - Protection	IP20	IEC 60529	Suitable for general indoor dry locations.
Housing - Finish	Matt White (RAL9016), Matt Black (RAL9005)	Powder Coated	Custom RAL finishes available on request for project quantities.
Certification	CE, RoHS, ErP, ISO9001:2015	EU Directives	Product complies with EU safety, substance, and ecodesign regulations.

Which spaces is it designed for?

The modularity of the X20S-D135 makes it adaptable to a diverse range of commercial environments, from luxury retail to performance-critical office spaces.

How can the X20S-D135 be configured for high-impact retail and showroom lighting?

For retail environments, colour rendering and visual impact are key. The X20S-D135 excels with its CRI 95+ and CRI 98+ options, ensuring that merchandise colours appear vibrant and true. The high-fidelity TM-30 metrics (Rf ~90, Rg ~100) further enhance the texture and saturation of fabrics and materials. Utilise the narrow 15° or 24° beam angles to create dramatic accent lighting on displays, mannequins, and hero products. For general circulation, the 38° or 60° beams with a UGR<19 rating provide comfortable, high-quality ambient light. The Matt Black finish with a black internal baffle is particularly effective at minimising source glare and focusing attention on the illuminated objects.

What makes this downlight suitable for modern office and conference room environments?

In office lighting, the primary concern is visual comfort and compliance with standards like EN 12464-1. The X20S-D135 is engineered for low glare, with specific configurations achieving a Unified Glare Rating (UGR) well below the <19 requirement for office tasks. A 4000K CCT and CRI 90+ light engine will create a productive and visually clear environment, delivering required lux levels of 300-500 lux on task areas. For conference rooms, specifying the downlight with a DALI-2 driver enables advanced control, allowing for scenes such as 'Presentation' (dimmed) and 'Meeting' (full brightness). Tunable White (TW) versions are also available, enabling human-centric lighting schemes that adjust colour temperature throughout the day.

Can this luminaire be used in hospitality and hotel guest room projects?

Absolutely. In hospitality, atmosphere is everything. The X20S-D135's Dim-to-Warm (DTW) functionality is perfect for creating a cosy, inviting ambience, smoothly transitioning from a bright 3000K down to a warm 1800K glow, mimicking traditional incandescent dimming. Standard warm CCTs like 2700K and 3000K are available with high CRI>90 to enrich the appearance of interior finishes. Compatibility with common control systems, including TRIAC phase-dimming for simple guest room retrofits and DALI for public areas like lobbies and restaurants, makes integration straightforward for electrical contractors.

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

Installation is streamlined by the flexible cutout size of 110mm to 130mm, which accommodates a variety of existing ceiling apertures. The luminaire is secured with simple spring clips. Electrically, the X20S-D135 is exceptionally versatile. We offer pre-wired solutions with remote drivers from leading EU brands. Control options include:

• DALI-2: For addressable, interoperable digital control in commercial buildings.
• 0-10V / 1-10V: A robust and simple analogue dimming standard.
• Phase-cut (TRIAC): For compatibility with standard leading/trailing edge wall dimmers.
• Wireless: Options including Casambi (Bluetooth Low Energy) and Zigbee provide app-based control, ideal for spaces where running new control wiring is difficult.

Full compliance with European standards is assured. The product carries the CE mark, is RoHS compliant, and meets ErP ecodesign requirements. Our manufacturing process is certified to ISO9001:2015, guaranteeing consistent quality and production management.

Customisation, MOQ and lead time

As a direct manufacturer, we offer extensive customisation. Beyond the standard options, we can provide custom RAL colour finishes for the trim to match any interior design palette. We can source and pair specific drivers to meet unique project specifications. The minimum order quantity (MOQ) for the X20S-D135 series is typically 100 units. Standard production lead time is approximately 15-25 working days, depending on configuration and quantity. Please contact us for project-specific quotations and lead time confirmation.

Frequently Asked Questions

Q: Do you provide photometric files for lighting design software?

A: Yes, we provide complete photometric data for all configurations of the X20S-D135. Full IES and LDT files are available upon request for use in DIALux, Relux, and other professional lighting design software. This allows for accurate simulation of lux levels, uniformity, and UGR for your project.

Q: What is the warranty on the X20S-D135 downlight?

A: The entire X20S-D135 luminaire is covered by a comprehensive 5-year warranty. This warranty covers the LED module, housing, and the specified driver. By using premium components like Bridgelux LEDs and Tridonic drivers, we ensure long-term performance and reliability with a design life exceeding 50,000 hours (L80/B10).

Q: How does the Dim-to-Warm (DTW) option work?

A: The Dim-to-Warm (DTW) light engine uses a specialised array of LEDs that allows the colour temperature to warm as the fixture is dimmed. At 100% brightness, the CCT is 3000K. As you dim the light down towards 10%, the CCT smoothly shifts down to a very warm 1800K, perfectly replicating the intimate glow of a dimmed halogen or incandescent lamp.

Q: Can I get a sample for evaluation before placing a large order?

A: Absolutely. We encourage specifiers and contractors to evaluate samples for quality and performance assessment. Samples can be configured to your project's specific needs (e.g., CCT, CRI, beam angle, driver type). Standard sample lead time is approximately 7-10 working days plus shipping time. Please contact our sales team to arrange a sample order.

Request IES files and a quotation

At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, our goal is to provide European, American, and Middle Eastern specifiers with high-performance, reliable, and configurable lighting solutions. The X20S-D135 modular downlight embodies this commitment to quality and flexibility. Contact our engineering team today to request full IES and LDT photometric files for your DIALux simulation, discuss your project requirements, and receive a formal quotation for your next specification-grade lighting project.