EU Regulation 2023/1670: What the New 120 lm/W Efficacy Rule Means

What Changed — and Why It Matters Now

At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, our engineering teams are closely monitoring the evolving regulatory landscape to ensure our clients in the EU and US are always ahead of the curve. A significant shift is now underway with the European Commission's Delegated Regulation (EU) 2023/1670, an amendment to the Ecodesign for Sustainable Products Regulation (ESPR). Published in the Official Journal of the European Union, this text sets a new, stricter standard for energy efficiency. The headline change is clear: from September 1, 2027, most single-ended LED luminaires and separate control gear placed on the EU market must achieve a minimum luminous efficacy of 120 lumens per watt (lm/W).

This regulation effectively makes energy efficiency classes lower than D obsolete for a vast category of common lighting products. While the 2019/2020 (SLR) and 2019/2015 (ELR) regulations laid the groundwork, this 2023 update specifically targets the high-volume market of single-ended LEDs—think non-directional downlights, spotlights, and linear fixtures.

The previous threshold allowed many entry-level products with efficacies around 80-100 lm/W to thrive. The new 120 lm/W minimum represents a significant technological leap, raising the performance floor and accelerating the phase-out of inefficient lighting.

For specifiers, contractors, and facility managers, this isn't a distant concern; it requires immediate attention in project planning and product specification to avoid costly sourcing issues and non-compliance down the line. The transition period is now, and understanding the technical nuances is critical for future-proofing lighting designs and investments.

The Technical Detail Behind the Headline

The 120 lm/W mandate is the most-cited figure, but true compliance involves a holistic view of luminaire performance. The regulation pushes manufacturers to optimize every component—from the LED chip and driver to the thermal management and optics—to meet the target without sacrificing light quality. A poorly designed high-efficacy luminaire might meet the lm/W number but deliver poor color rendering (CRI), high glare (UGR), or an unstable light output. This is why a comprehensive technical specification sheet is more important than ever. Below is a sample specification for a compliant, high-performance luminaire designed to meet and exceed the 2027 requirements, demonstrating how different parameters interact.

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What This Means for Specifiers and Buyers

The phase-out of less efficient products creates both challenges and opportunities. On one hand, the supply chain for cheaper, lower-spec products will evaporate, potentially disrupting projects planned with outdated specifications. On the other, this regulation forces the market towards higher-quality, more sustainable lighting solutions that offer a better return on investment over the product lifecycle. The key is to shift the procurement mindset from initial cost to Total Cost of Ownership (TCO), where energy savings and reduced maintenance far outweigh a higher upfront investment.

For buyers and specifiers in the EU and those in the US/ME exporting to the EU, the immediate task is to audit current specification lists and supplier catalogues. Any product with a system efficacy below 120 lm/W should be flagged for replacement in future designs.

This proactive approach ensures that projects specified today will be sourceable and compliant when construction begins in two or three years. It also signals to manufacturers that the market is ready for innovation and high-performance standards, driving further investment in R&D.

How Does This Regulation Affect Long-term Maintenance and Replacement Cycles?

This regulation fundamentally improves the outlook for long-term maintenance. By specifying luminaires that meet the 120 lm/W standard today, facility managers are ensuring a future supply of compatible replacements. Attempting to maintain an installation of sub-100 lm/W fixtures post-2027 will become a logistical nightmare, as manufacturers will have ceased production. Furthermore, higher efficacy directly translates to lower energy consumption. A typical office upgrading from 90 lm/W fluorescent tubes to 140 lm/W LED panels can see energy savings of over 35%, reducing operational costs significantly. A 5,000-hour-per-year operation could save approximately 25 kWh per fixture annually, delivering a payback period of just 2-3 years on the initial investment.

What Are the Risks of Specifying Non-compliant or Borderline Products Now?

Specifying products that are currently compliant but sit near the new threshold (e.g., 105-115 lm/W) is a risky strategy. Firstly, market surveillance authorities (MSAs) in EU member states will be actively testing products. Any product found to be non-compliant after September 1, 2027, will be subject to recall, and the importer or distributor will face legal penalties. For a contractor or specifier, this could lead to reputational damage and the costly task of replacing installed fixtures. Secondly, relying on a product that is about to be made obsolete creates significant supply chain risk for future phases of a project or for maintenance stock. It's far wiser to specify products that comfortably exceed the 120 lm/W minimum, providing a buffer against manufacturing tolerances and future regulatory tightening.

Beyond Efficacy, What Other Performance Metrics Are Becoming Critical for Future-proof Specifications?

The focus on lm/W should not overshadow the ultimate goal: creating high-quality, comfortable, and productive illuminated spaces. Forward-thinking specifiers are already looking beyond raw efficiency. Metrics from IES TM-30-18, specifically Fidelity (Rf) and Gamut (Rg), provide a much more nuanced view of color rendering than the traditional CRI. An Rf >90 and Rg near 100 indicates vivid, accurate color, crucial for retail, hospitality, and museum applications. Similarly, Unified Glare Rating (UGR) is a non-negotiable metric for user comfort, with UGR <19 being the standard for quality office lighting. Finally, incorporating robust control systems like DALI-2 not only maximizes energy savings through daylight harvesting and occupancy sensing but also enables human-centric lighting strategies, where color temperature and intensity are tuned throughout the day to support occupant wellbeing.

Compliance Checklist (IES / LDT / DIALux / CE / RoHS / ErP)

To ensure a smooth project execution, European and international specifiers must adopt a rigorous validation process. Do not take a catalogue claim at face value. Here is a practical checklist:

1. Request Full Photometric Data: Demand complete IES and LDT photometric files for any proposed luminaire. This is the raw data that proves performance. A simple PDF datasheet is not enough.

2. Simulate in DIALux: Use the IES/LDT files to model the luminaire in DIALux or a similar lighting design software. This is the only way to verify that the high-efficacy product will meet the specific lighting objectives of your project (e.g., achieving an average of 500 lux on the work plane with a uniformity of 0.6 and a UGR < 19).

3. Scrutinize the ErP Label: Demand a copy of the official EU Energy Label for the product. Verify that the luminaire is rated Class D or higher (ideally A, B, or C) and cross-reference the stated efficacy with the photometric data.

4. Verify CE and RoHS Compliance: Obtain the Declaration of Conformity for the CE mark. This document is the manufacturer's legal declaration that the product complies with all relevant EU health, safety, and environmental protection legislation. RoHS compliance ensures the product is free from hazardous substances.

5. Review Driver and Chip Specifications: Ask for the datasheets for the specific LED chips and driver used. This helps verify the quality of the core components and allows for a more accurate assessment of the product's expected lifetime and reliability.

Frequently Asked Questions

Q: What Is the Exact Deadline for This New EU Regulation?

The regulation EU 2023/1670 dictates that from September 1, 2027, covered lighting products placed on the EU market for the first time must meet the new minimum efficacy requirements. Products already on the market or in the supply chain before this date can still be sold until stocks are depleted.

Q: Does This Apply to All LED Lights or Just Specific Types?

The 120 lm/W requirement specifically targets single-ended mains-voltage LED lamps and luminaires, which includes a huge range of common products like downlights, spotlights, and many linear fixtures. It does not apply to all categories; for instance, some specialty or decorative lights with lower light output may have different requirements.

Q: Will My Existing Installations Become Illegal After 2027?

No, the regulation governs the 'placing on the market' of new products. Your existing installations are not affected, and you are not required to replace them. However, when you do need to replace a fixture after September 2027, you will only be able to purchase a new one that meets the updated, higher efficiency standards.

Q: How Can I Verify a Product's Compliance with EU 2023/1670?

The most reliable method is to check the product's official EU Energy Label, which must display an energy class of D or better. You should also request a full technical datasheet and the Declaration of Conformity from the manufacturer, which legally attests that the product meets the stated 120 lm/W efficacy and other ErP criteria.

Talk to Our Engineering Team

The transition to higher efficacy standards is a positive step for the lighting industry and the planet, but it requires careful navigation. Partnering with a manufacturer that has a deep understanding of both the technology and the regulations is essential for success. Our team can help you select or customize luminaires that not only meet the 120 lm/W mandate but also deliver exceptional light quality and long-term value for your projects. At XHLWX (led-project-light.com), a Custom Indoor LED Lighting Manufacturer based in China, we are ready to assist you in future-proofing your lighting specifications.