Lighting Industry Adopts Circular Economy Principles
Recent industry discussions highlight a growing focus on circular economy principles in lighting design, centered on modularity, serviceability, and design for disassembly. Architects are increasingly expecting material transparency and lifecycle assessments from manufacturers. Practical strategies discussed include using mechanical fasteners over adhesives and selecting materials for their recyclability.
- The CIBSE Technical Memorandum TM66 provides a framework and an "Assured Product Verification Scheme" to give credibility to circular economy claims for lighting products, helping specifiers avoid "greenwashing". Published in 2021, it was developed by the Lighting Industry Association and Chartered Institution of Building Services Engineers to create a standardized method for assessing a luminaire's circular credentials. - Life Cycle Assessments (LCAs) are being used to quantify the total environmental impact of lighting products, moving beyond just energy efficiency to include manufacturing, transport, and disposal. Studies show the "use" phase has the highest environmental impact for most lighting products due to energy consumption, but manufacturing of the LED package itself can account for up to 27% of life-cycle energy use. - AI-driven lighting controls can reduce a building's lighting energy consumption by up to 50% through strategies like analyzing usage patterns, integrating with natural daylight sensors, and dynamically adjusting individual fixtures based on real-time occupancy. This level of control helps buildings meet stricter energy standards like LEED and the EU's Energy Performance of Buildings Directive (EPBD). - The WELL Building Standard uses a metric called Equivalent Melanopic Lux (EML) to measure light's impact on human circadian rhythms. To achieve certification for work areas, a project must provide at least 200 EML at eye level for a significant portion of the day, a target that influences the specification of tunable white and daylight integration technologies. - Discoveries of intrinsically photosensitive retinal ganglion cells (ipRGCs), which contain the photopigment melanopsin, form the biological basis for human-centric lighting. These cells are critical for synchronizing the body's internal clock and influence hormone production, mood, and sleep-wake cycles, driving the adoption of tunable white lighting that can mimic natural daylight patterns. - The DALI-2 protocol significantly improves upon the original DALI standard by ensuring multi-vendor interoperability through a mandatory certification process. It expands functionality by allowing control devices like sensors and switches to be directly connected to the bus and supports up to 128 devices (64 control gear, 64 control devices), compared to the original's 64 total. - Integrating lighting with broader building automation systems (BAS) via IoT protocols like BACnet and MQTT allows for holistic energy management. Data from lighting occupancy sensors can inform HVAC adjustments, and the entire system can be connected to the cloud for remote monitoring and predictive maintenance alerts. - Design leadership is increasingly focused on educating the next generation of lighting professionals to navigate these complex technical and sustainable challenges. Organizations like the International Association of Lighting Designers (IALD) and initiatives like the "Business of Light" aim to elevate the profession by fostering strategic thinking beyond pure aesthetics.
