Signify Exec: Human-Centric Lighting Now 'At the Forefront'
Sumit Joshi of Signify notes that human-centric lighting has moved beyond a niche concept and is now "at the forefront of any design." He observes that over the last two years, lighting designs have become more thoughtful, incorporating circadian rhythm support and personalized settings. This market shift is tightly linked to rising demand for wellness-focused certifications like WELL and Fitwel.
- The WELL Building Standard v2 uses Equivalent Melanopic Lux (EML) as a primary metric for circadian lighting design, requiring at least 150 EML for a minimum of four hours daily to support occupants' sleep quality and mood. This metric specifically measures light's impact on the intrinsically photosensitive retinal ganglion cells (ipRGCs), which contain melanopsin and are key to regulating circadian rhythms. - Recent advancements in tunable white technology now allow for consistent high lumen output (up to 10,000 lumens) across a wide color temperature range (2700K to 6500K), overcoming a key previous limitation where tuning to either extreme would cause a significant loss of brightness. This makes tunable systems more viable for large-scale projects with high ceilings that were previously limited to single-color sources. - The DALI-2 standard enhances smart lighting systems by ensuring greater interoperability between devices from different manufacturers and enabling two-way communication. This allows for advanced diagnostics, energy consumption monitoring, and integration with broader building management systems (BMS) and IoT platforms via DALI-2 IoT gateways. - In sustainable design, the circular economy model is shifting luminaire design toward modularity, serviceability, and the use of recycled materials. This "design for disassembly" approach, central to certifications like Cradle to Cradle, extends the product lifecycle through easier repairs, component upgrades, and parts harvesting. - Publications like *Dezeen*, *ArchDaily*, and *Architectural Record* are frequently highlighting lighting schemes that move beyond simple illumination to become integral architectural features. Recent award-winning projects often showcase the integration of new media art and lighting, or use light to create immersive, brand-defining experiences in retail and hospitality spaces. - Chronobiology research shows that light is the most powerful "zeitgeber" (synchronizing agent) for the human circadian system. The timing, intensity, and spectral composition of light exposure are critical; morning light advances the internal clock, while evening light delays it, directly impacting sleep-wake cycles and alertness. - For design leadership, a deep, specialized knowledge of lighting art and science is what distinguishes senior designers who advance to leadership roles, enabling them to confidently lead project scoping and strategy. Career progression often involves moving from a purely design-centric role to leadership within a design studio, or pivoting to strategic roles in manufacturing or sales.
