It is clear that further clarity is required with regard to the topic of integrative lighting (circadian lighting). This relates to what is currently understood about non-visual effects of light and to claims being made about the potential benefits of integrative lighting.
This document updates the Society of Light and Lighting Position Statement on Circadian Lighting published in July 2020. In this version, the Society of Light and Lighting has adopted the terminology used by the International Commission on Illumination (CIE) and refers to 'integrative lighting'.
With ongoing research and commercial interest in integrative lighting, the Society of Light and Lighting (SLL) reaffirms its position on this topic. This statement reflects advances since the 2020 edition
The purpose of this document is to define the SLL’s understanding of integrative lighting, summarise the evidence that is mature enough to inform practice, and identify the uncertainties that still limit prescriptive guidance. It is a position statement, not a design standard. Practitioners should therefore use it to inform professional judgement, avoid over-claiming, and distinguish clearly between established principles, emerging evidence and open research questions.
SLL Integrative Lighting Position Statement - August 2026
SLL Circadian Lighting Position Statement - Version 2 (July 2020)
SLL Circadian Lighting Position Statement - April 2019
The intention is for this document to be reviewed and updated on a regular basis.
Whilst references are made to existing and ongoing research within the document, this is by no means an exhaustive list.
Should you wish to suggest further resources or studies, please contact [email protected]