The Society of Light and Lighting (SLL) welcomes all who are interested in any aspect of light, lighting, and its applications.
With over 3300 members globally, the Society of Light and Lighting (SLL) is recognised as an authority on lighting and welcomes all who are interested in any aspect of the world of light, lighting, and its design or application. Lighting designers, consulting engineers, researchers, students, academics, manufacturers, sales staff and many more all contribute to and are members of the SLL.
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If you would like to contact SLL regarding membership, publications, or events, or you are interested in the opportunity of joining one of the SLL committees please email SLL.
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About
Our people including Area Reps, Committees, Council, Executive Board and our History.
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Knowledge & Resources
Lighting Guides, Light Lines magazine, past Webinars, Fact Files and the Lighting Research & Technology (LR&T) Journal.
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Learning & Development
How to develop your career, available lighting courses and related training.
Find out moreLatest SLL News
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SLL Ready Steady Light 2026
On 15th October, The Society of Light and Lighting (SLL) welcomed teams of lighting professionals for the annual SLL Ready Steady Light competition, in association with Rose Bruford College and IALD.
SLL Young Lighter Finalists 2026 announced
The SLL are delighted to announce the finalists for this year's Young Lighter.
SLL are supporting LiGHT 26
The SLL are delighted to be supporting LiGHT 26 at the Business Design Centre in Islington, London, on the 18th and 19th of November 2026.
Upcoming SLL Events
View All- Group SLL, Northern Ireland
- Date November 12th 2026, 17:30 - 19:30
- Location Belfast
Energy, Sustainability, Climate & the Environment
- Group SLL, HCNE, HCNW, HCSE, HCSW, Yen London
- Date November 18th 2026, 10:00 - 17:00
- Location London
- Group Building Simulation, CIBSE Fellows, Daylight, Data Centre, Education Buildings, Electrical Services, Energy Performance, Facilities Management, Healthcare, Heat Networks, Heritage and Retrofit Group, Homes for the Future, HVAC Systems, Information Technology & Controls, Intelligent Buildings, Natural Ventilation, Resilient Cities, Sustainability, WIBSE, SDE, SFE, SLL, SOPHE, SoVT, HCNE, HCNW, HCSE, HCSW
- Date November 26th 2026, 16:30 - 18:30
- Location Location TBD
Energy, Sustainability, Climate & the Environment
- Group SLL, HCNE, HCNW, HCSE, HCSW, Yen London
- Date November 18th 2026, 10:00 - 17:00
- Location London