What is “healthy lighting” and why should it matter to designers? At Lightovation, from June 18 to 21, Dr. Mariana Figueiro, a leading expert in circadian science, shared how light profoundly influences sleep, well-being, and daily performance. She broke down the main elements of circadian-effective lighting, including timing, intensity, and spectrum. She offered practical takeaways on how to apply this knowledge to residential design in ways that truly support human health.
Designing Lighting for Wellness
- Lighting as a Multisensory Tool
Lighting isn't just lighting - it's a tool that shapes how we perceive and experience space. Proper lighting enhances color accuracy, contrast, and safety, helping reduce fall risks and improve function.
- Supporting Circadian Health Through Design
Circadian rhythms regulate sleep, hormones, and body temperature. Because they’re heavily influenced by light, especially the timing and intensity, environments with limited daylight and too much artificial light at night can negatively impact energy, mood, and health.
- Embracing Light as a Wellness Feature
Designers can support well-being by managing how light reaches occupants. Key strategies include:
- Providing 300–500 lux of vertical light at eye level for 2–3 hours in the morning
- Using dim, warm lighting in the evening to support natural wind-down rhythms
- Bringing light closer to eye level with floor lamps, pendants, or integrated features
- Refining with Metrics and Intuition
There are tools designers can use, such as the MEDI (Melanopic Equivalent Daylight Illuminance) metric, that help assess how lighting supports circadian health and allow designers to balance data with design instincts.
- Creative Applications for Daily Impact
The best solutions are often simple: dimming controls, layered lighting, and strategic placement. These can be seamlessly integrated into homes, offices, or hospitality spaces without sacrificing aesthetics. Dynamic Lighting: Incorporate tunable white light systems that mimic natural daylight patterns—cooler and brighter in the morning, warmer and dimmer in the evening.
Lighting Considerations
- Introduce bright, daylight-like lighting in the morning
- Dim lights or layer them in the evening
- Use fixtures that bring light to eye level while blending with the space
- Explore biophilic lighting as a tool for enhancing well-being
Design that supports circadian rhythm doesn’t have to feel cold and clinical. It can be warm, beautiful, and personal. With thoughtful lighting, designers can shape spaces that don’t just look good—but make you feel good too. Dr. Mariana Figueiro emphasizes that light is not just a visual or decorative element—it is a powerful biological agent. Light impacts human physiology, mood, productivity, and sleep cycles. By strategically integrating light into design, interior designers can influence occupants' health and well-being at a foundational level.
Register for Dallas Design Week, September 16-18, running concurrently with Total Home & Gift Market, September 16-18, and ArchLIGHT Summit, September 16-17, and explore residential, commercial, and industrial lighting to let your designs promote wellness for your clients.