PL-B620 Backlit LED Panel Light 40W

What is the PL-B620 and where is it specified?

At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we present the PL-B620 Backlit LED Panel Light, a 40W high-performance luminaire engineered for modern commercial interiors. Unlike edge-lit panels that rely on a light guide plate (LGP) which can yellow over time, the PL-B620 features a robust backlit construction. This design directs light through a deep-cavity, high-transmittance PMMA diffuser, ensuring exceptional uniformity and eliminating the risk of discoloration for a significantly longer operational life. With a high efficacy of 110 lm/W and a flicker-free driver as standard, it delivers comfortable, efficient illumination compliant with stringent European and US standards. The 620x620mm format makes it a perfect one-for-one replacement for legacy fluorescent troffers in metric T-bar ceiling grids, making it a preferred choice for specifiers and contractors executing large-scale office, educational, and healthcare lighting projects.

Photometric and electrical specification

The PL-B620 is designed to meet the demanding requirements of professional lighting projects. Full photometric data in IES and LDT formats are available for integration into DIALux and other lighting design software. Key performance metrics are detailed below.

Parameter	Specification	Standard	Notes
Luminous Efficacy	110 lm/W	ErP	High efficiency for reduced operational cost.
Luminous Flux	4400 lm	-	At 40W, 4000K.
Correlated Color Temperature (CCT)	2700K - 6500K	-	Standard 4000K. Tunable White optional.
Color Rendering Index (CRI)	Ra > 80	EN 12464-1	Ra>90 available on request.
Color Fidelity / Gamut (TM-30)	Rf ~84, Rg ~95	IES TM-30-18	Provides a more complete color quality metric.
Unified Glare Rating (UGR)	UGR < 19	EN 12464-1	Achieved with micro-prismatic diffuser option.
Beam Angle	120°	-	Wide, uniform distribution for general lighting.
Input Power	40W	-	Power Factor > 0.95.
LED Driver Brand	Tridonic / Mean Well / Osram	-	Based on project specification; flicker-free.
LED Chip Brand	Bridgelux / Samsung / Osram	-	Ensures long life and consistent performance.
Housing Material & Finish	Die-cast Aluminum Frame, Steel Back	RAL9003	Standard matte white powder coat.
IP Rating	IP40	IEC 60529	Protected against objects >1mm and dust ingress.
Certifications	CE / RoHS / ErP / ISO9001	EU/International	SAA, FCC also available.

Which spaces is it designed for?

The PL-B620's specification profile makes it an ideal general lighting solution for a wide range of professional environments where visual comfort, energy efficiency, and low maintenance are paramount. Its design focuses on delivering high-quality, uniform light for task-oriented spaces across Europe, the US, and the Middle East.

How does the PL-B620 support task performance in open-plan offices?

In a typical open-plan office, achieving a uniform illuminance of 300-500 lux on the task plane is critical. The PL-B620's wide 120° beam angle allows for flexible spacing while maintaining excellent uniformity. More importantly, when specified with the micro-prismatic diffuser, it achieves a UGR < 19. This is crucial for compliance with the EN 12464-1 standard for lighting of indoor workplaces, minimizing glare on computer screens and reducing visual fatigue for employees, thereby supporting productivity and well-being.

Can this panel be used in schools or healthcare facilities?

Yes, the PL-B620 is highly suitable for these applications. The standard flicker-free driver is essential in educational settings to prevent eye strain and headaches for students and staff. In healthcare environments, such as corridors, waiting rooms, and non-critical clinical areas, the IP40 rating prevents dust and insect ingress into the luminaire, simplifying cleaning routines. Its die-cast aluminum frame and robust construction (IK06) ensure durability in high-traffic public spaces.

Is it suitable for retrofitting old fluorescent troffers?

The PL-B620 is an excellent choice for retrofit projects. The 620x620x25mm dimensions are designed for a direct drop-in replacement of common 600x600 metric grid ceiling tiles and the associated 4x18W T8 fluorescent fixtures. A single 40W PL-B620 panel can replace a fluorescent fitting that consumes over 72W (including ballast losses), delivering energy savings exceeding 50%. Combined with a 50,000-hour L80B10 lifespan, this drastically reduces maintenance cycles and costs associated with re-lamping.

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

Flexibility in installation and control is central to the PL-B620 design. It can be installed in three primary ways: recessed into a standard T-bar ceiling grid, surface-mounted using a dedicated frame kit, or suspended via an adjustable wire suspension kit. These kits are supplied separately to match project requirements.

Control system integration is seamless. While the standard model is a non-dimmable, flicker-free unit, we offer several control protocol options:

• 0-10V Analog Dimming: A simple and reliable dimming solution for connection to wall dimmers or basic control systems.
• DALI-2: For advanced, addressable digital control systems, offering individual luminaire control, status monitoring, and integration into building management systems (BMS). Our DALI drivers are DiiA certified.
• Wireless Control: We can integrate Casambi Bluetooth Mesh modules for app-based and wireless switch control, ideal for retrofits where running new control wiring is impractical.

All versions of the PL-B620 are fully certified with CE (LVD/EMC), RoHS, and meet the latest European ErP (EcoDesign) requirements, ensuring market compliance and performance verification.

Customisation, MOQ and lead time

As a manufacturer, we offer extensive customisation. Beyond CCTs (from 2700K to 6500K) and Tunable White, we can supply panels with high CRI (Ra>90) for color-critical applications. Frame colors can be customised to any RAL code for a minimum order quantity. Emergency lighting versions with integrated 3-hour battery packs are also available.

The standard MOQ for the PL-B620 is 100 units. For pilot projects or smaller requirements, please contact our sales team. Our typical production lead time is 15-20 working days for standard orders up to 500 units, with shipping from our facility in China to major ports in the EU, US, and Middle East coordinated by our logistics team.

Frequently Asked Questions

Q: What does a UGR<19 rating mean for this LED panel?

A: UGR<19 means the luminaire, when installed according to a standard room layout, produces very low discomfort glare. This is a requirement for office lighting under European standard EN 12464-1, especially for areas with intensive VDU (screen) use. Our PL-B620 achieves this with an optional micro-prismatic diffuser, ensuring a comfortable working environment and reducing eye strain for occupants over an 8-hour workday.

Q: What is the real-world lifespan of the PL-B620?

A: The PL-B620 is rated for 50,000 hours to L80B10 standard at a 25°C ambient temperature. This means that after 50,000 hours of operation, the LED panel will retain at least 80% of its initial light output (L80), with only 10% of a large batch of panels falling below this threshold (B10). This ensures long-term, predictable lighting performance and is backed by our 5-year manufacturer's warranty.

Q: How difficult is it to install in an existing ceiling grid?

A: Installation is straightforward for a qualified electrician. For a standard recessed installation in a 620x620mm metric grid, the old fixture is removed, and the PL-B620 panel simply lays into the T-bar grid. The external driver is connected to the mains supply (AC 100-277V) and then plugged into the panel via a secure DC connector. The luminaire itself weighs approximately 2.8 kg.

Q: Are different dimming options available for this model?

A: Yes, the standard PL-B620 is non-dimmable. However, we offer several factory-fitted dimming options to suit different control systems. These include 0-10V analog dimming, TRIAC phase-cut dimming for residential-style controls, and DALI-2 for integration into smart building systems. Please specify your required control protocol when requesting a quotation, as the driver and price will vary accordingly.

Request IES files and a quotation

To facilitate your lighting design process, we provide comprehensive photometric data including IES and LDT files, compatible with DIALux, AGi32, and Relux. These files allow you to accurately model the performance of the PL-B620 in your project environment. For pricing, customisation options, or to request a sample, please contact our international sales department. At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we are committed to providing specifiers, contractors, and distributors with high-quality, certified, and cost-effective lighting solutions for global projects.