Light + Health

  Modern energy-saving lighting and glazing may have unintentionally altered the biological quality of indoor light, according to a New Scientist feature article examining emerging research on red and infrared (IR) wavelengths. The article argues that the widespread move to LEDs and IR-filtering window glass has substantially reduced people’s exposure to long-wavelength light—a change that [...]

  Neuroscience-informed design positions illumination as a practical tool for reducing cognitive load, strengthening wayfinding, and giving students greater control over their learning environments. As higher-education institutions focus more closely on student well-being, retention, and academic success, neuroinclusive design is moving beyond its traditional accessibility role. Campus environments are beginning to acknowledge the many ways [...]

  Sleepal AI Lamp is a smart bedside luminaire designed to combine circadian-aware lighting, environmental sensing and contactless sleep analysis in a single consumer product. Positioned at the intersection of connected lighting, wellness technology and smart-home control, the Kickstarter-backed product seeks to replace wearable sleep trackers with a fixed, camera-free bedside device. Rather than relying [...]

  New research suggests that light’s effects on sleep and circadian timing depend on the full 24-hour light environment, not just “morning light good, evening light bad.” Using a mathematical model, researchers showed that brighter daytime exposure can make the body more resilient to disruptive evening light, and they generated testable predictions about when light [...]

  The U.S. House of Representatives passed the Sunshine Protection Act, last week, but the change is not law yet. The bill still needs Senate approval and a presidential signature before daylight saving time could become permanent. For the lighting industry, the bigger story is less about the clock change itself than about how a [...]

  Researchers in China report a light-activated nanocomposite that could tackle infected wounds on three fronts at once: kill bacteria, help clear the wound, and support tissue repair. In lab and mouse tests, the gold nanoparticle/graphene oxide quantum dot system plus blue LED light eradicated about 97% of bacteria and drove nearly 99% wound healing [...]

  Smart home technology can improve quality of life for people with autism, older adults, and others who benefit from added support at home. Smart home tools are more than novelty gadgets. Rather, they can be practical systems that can reduce stress, increase safety, and make daily routines more manageable. Technology works best when it [...]

  A 2022 study “Evening blue‐light exposure, maternal glucose, and infant birthweight” investigated whether exposure to blue‐enriched light in the evening during late pregnancy is linked to maternal fasting glucose levels and infant birthweight. The rationale builds on evidence that circadian disruption, melatonin suppression, and altered sleep from nighttime light exposure can influence metabolic regulation, [...]

Figure 1. Feasibility boundaries for achieving 250 m-EDI.   By Bill Chan, President, LiteController Inc. Shortly after my recent IES FIRES article, “Circadian Lighting in Offices: Feasibility Boundaries and Design Trade-Offs” was published, an architectural lighting designer left a comment on LinkedIn: “Nowadays, it’s getting [to be] a real Mission Impossible!” That brief comment perfectly [...]