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.
The SLL recognises the expertise of the lighting community in tackling the challenges which face us all, considering the climate emergency, global political uncertainty, rapid technological change, significant societal shifts, and skills shortages.
SLL is a learned Society and promotes education and knowledge transfer in a variety of ways, including seminars and webinars, and an events programme that runs all year round. As part of this there are a number of publications and guidance notes available for free (pdf) or at reduced cost to our members as part of their CIBSE membership.
If you would like to contact SLL regarding membership, publications, events, or you are interested in the opportunity of joining one of the SLL committees please email SLL.
Joining SLL
The Society offers grades of membership designed to recognise members’ knowledge and expertise.
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Publications and Guidance
SLL members can download PDF versions of SLL publications for free as part of their CIBSE membership
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Lighting Research & Technology
Lighting Research & Technology (LR&T) is CIBSE's international journal containing refereed papers on all aspects of lighting research and technology.
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Light Lines Newsletter
Light Lines is the Society’s bi-monthly magazine. It includes carefully curated content on an array of different lighting topics. Read the latest issue online.
SLL Light Lines MagazineEmbodied carbon in building services: Lighting
Embodied carbon in building services: lighting (TM65.2) provides lighting designers, specifiers, lighting engineers and manufacturers with an understanding of the amount of embodied carbon that a light fitting contains.
Future SLL Events
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Latest News
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Lighting professionals welcomed to the annual SLL Ready Steady Light competition, in association with Rose Bruford College and IALD.
This is the 20th Anniversary of SLL's Ready Steady Light Competition where 15 teams create external lighting installations, using a limited selection of equipment in only 180 minutes. The teams have to overcome challenges without a budget and within time constraints.
Light Night Leeds 2023
In association with Light Night Leeds 23, members of the Society for Light and Lighting (SLL) are lighting Leeds Minster, in the style of Pockets of Light.
LG14: Control of Electric Lighting
The Society of Light and Lighting (SLL) has launched the latest revision of SLL Lighting Guide LG14: Control of Electric Lighting. Initially published in 2016, this is the second edition of LG14. It sets out a logical approach for the professional designer to consider the consultation, design, specification, commissioning and handover of a lighting installation incorporating controls.
Lighting for Offices
The Society of Light and Lighting (SLL) has published a new edition of Lighting Guide 7: Lighting for Offices.
The office environment has changed considerably in recent years. Tablet and smartphone use continue to free people from their desks and present challenges to lighting designers. It is likely that people will spend some time in offices but that their working week may see them work from various locations, including their homes. As such, this revision of Lighting Guide 7 now includes advice on lighting for a home office.
The SLL Sponsors
International Day of Light
International Day of Light