Study

A new advisory document from the International Association of Lighting Designers (IALD) highlights the importance of the biological functions of lighting and recommends its integration into lighting design to support human health and well-being.

About study

✓ Mood, Overall health

Title:

Lighting Design for Health, Wellbeing and Quality of Light, A Holistic Approach to Integrative Lighting

Author: International Association of Lighting Designers Kevan Shaw, Ioannis Ladopoulos, Chiara Carucci, Alexia Gkika Lorraine Calcott
Date: 28. February 2025
Source: https://www.semanticscholar.org/paper/Lighting-Design-for-Health%2C-Wellbeing-and-Quality-A-Ladop...
https://758dda30-babe-4302-a2ee-c85788cfef5b.usrfiles.com/ugd/758dda_895281f99cdd489693d8fc09b5d7...
PDF: Lighting Design for Health, Wellbeing and Quality of Light, A Holistic Approach to Integrative Lighting.PDF

Brief summary

Experts from the International Association of Lighting Designers, through a comprehensive study, emphasize the responsibility of lighting designers to avoid creating lighting designs based solely on traditional technical and aesthetic parameters. They advocate for considering the biological effects of light on users' health and well-being in their plans. The document focuses on a holistic approach to lighting, specifically the concept of integrative lighting, which combines visual perception with biological and psychological responses to light, such as hormonal regulation, metabolism, and cognitive performance. Additionally, it underscores the necessity of proper light exposure at the right time to support circadian rhythms and ensure the optimal functioning of the human body. The association recommends that designers and architects use metrics like Melanopic Equivalent Daylight Illuminance (MEDI), which reflect the biological effects of light, instead of relying solely on commonly used lumens.

Infrared (IR) and near-infrared (NIR) wavelengths in lighting demonstrate a positive impact on overall health, including the prevention of neurodegenerative diseases.

A significantly covered area involves IR and NIR wavelengths, which have traditionally been considered energy-inefficient and are not widely used in modern lighting. However, new research indicates that red light has beneficial effects on mitochondrial health, metabolism, and cell regeneration, positively influencing overall health and aiding in the prevention of neurodegenerative diseases.

Scientific findings highlight the negative effects of flicker in common LED lighting.

The document also warns about the dangers of LED flicker, which is often invisible but can cause fatigue, headaches, and diminished cognitive functions, especially in sensitive individuals (e.g., those with epilepsy or migraines).

Additionally, it emphasizes the need for regulations and standards to ensure higher-quality and healthier lighting, such as through the WELL Building Standard and other initiatives.

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