SLL - Society of Light and Lighting

What SLL - Society of Light and Lighting does

SLL - Society of Light and Lighting is a UK-based professional society operating under The Chartered Institution of Building Services Engineers (CIBSE), a charity registered in England (Charity No. 278104). Founded in 1909 and headquartered in London with 11 employees, the society serves over 3,300 members globally, including lighting designers, consulting engineers, researchers, students, academics, manufacturers, and sales staff. It functions as a membership-driven community and standards body for the lighting profession in the built environment.

SLL's core offerings span a content portfolio and an events/training program. The content library includes the peer-reviewed Lighting Research & Technology (LR&T) journal, the Light Lines magazine, a suite of Lighting Guides, and Lighting Fact Files such as LF12 (2026) on thermoplastic diffusers and fire safety. Complementary offerings include webinars (e.g., the #GrowYourKnowledge series), seminars, conferences (Dark Sky Conference 2026, ICEL Conference 2026), and the AGM and Presidential Address. Learning & Development Programs and corporate training are delivered through the CIBSE platform, with course pricing in the £370–£495+VAT range.

SLL generates revenue through four streams: recurring membership subscriptions, one-time publication sales, professional-services training fees, and event registration fees (e.g., the Sustainability Unfiltered series jointly run with The Lighting Industry Association). Distribution is centralized on the CIBSE website, with member acquisition supported by organic social channels on LinkedIn, X (@SLL100), Instagram (@sll100), YouTube, and Facebook. The society operates from the new CIBSE Offices in London and maintains international member presence in markets including Australia, New Zealand, Canada, Hong Kong, Ireland, and Malaysia.

Name

SLL - Society of Light and Lighting

Legal name

The Chartered Institution of Building Services Engineers (CIBSE)

Website

https://sll.org.uk

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

SLL is a UK-based professional society operating under CIBSE, serving over 3,300 lighting designers, engineers, researchers, students, and manufacturers globally through membership, peer-reviewed publications, technical guidance, training, and industry events.

Ownership category

akta.pro rank

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Membership Fees: Annual membership subscriptions for lighting professionals including designers, engineers, researchers, students, academics, and manufacturers
2. Publications: Sale of lighting publications, guides, and journals including the Lighting Research & Technology journal
3. Training Courses: Revenue from lighting training courses offered through CIBSE platform
4. Events: Registration fees for events, conferences, webinars, seminars, and the AGM/Presidential Address

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

SLL is a professional society under CIBSE that provides lighting professionals with membership services, peer-reviewed research publications (Light Lines magazine, LR&T Journal), technical Lighting Guides and Fact Files, training courses, and events/webinars. Its purpose is to serve as the recognized authority on light and lighting in the built environment for designers, engineers, researchers, students, and manufacturers.

Product overview

SLL - Society of Light and Lighting is a professional society operating under CIBSE (The Chartered Institution of Building Services Engineers) with over 3,300 members globally. The organization offers a unified membership program that provides access to its portfolio of knowledge resources including Light Lines magazine, the Lighting Research & Technology (LR&T) Journal, Lighting Guides, and Lighting Fact Files. Additional offerings include webinars, seminars, and events such as the Sustainability Unfiltered series and Dark Sky Conference. The society also provides learning and development programs and career development support for lighting professionals including designers, engineers, researchers, and manufacturers.

Differentiator

Problem solved

Functional benefit

Products and services

• SLL Membership
• Lighting Research & Technology (LR&T) Journal

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• The Lighting Industry AssociationcoreStrategic or Co-development Partner · 1 January 2026SLL and The Lighting Industry Association have partnered to present 'Sustainability Unfiltered,' a new event series focusing on sustainability in the lighting industry. The series includes events in Manchester, London, and Edinburgh, representing a collaborative effort to address sustainability challenges facing the lighting profession.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Regional players

• Professional Lighting Design Association (PLDA): European association for lighting design professionals. Functions as a regional peer to SLL across continental Europe, running design awards, conferences, and education with overlapping designer membership.

Direct peers

• International Commission on Illumination (CIE): International scientific authority on light, lighting, vision, and photobiology. CIE is a direct peer in terms of producing lighting research, standards, and publications that overlap with SLL's LR&T journal and Lighting Guides.
• Illuminating Engineering Society (IES): North American professional society for lighting, publishing LEUKOS and running LIGHTFAIR-adjacent education. Closest functional peer to SLL: a chartered society that issues lighting standards, runs CPD, and serves designers, engineers, and manufacturers.
• Institution of Lighting Professionals (ILP): UK-based professional body for lighting designers, engineers, and public lighting practitioners. Direct domestic peer to SLL with shared UK audience, CPD offerings, and policy advocacy in lighting.
• International Association of Lighting Designers (IALD): Global association for architectural lighting designers. IALD is a direct peer for SLL's designer and engineer membership, with overlapping events, awards, and continuing-education programmes.

Others

• DALI Alliance: Industry alliance promoting DALI lighting-control standards. Ecosystem peer rather than direct competitor: shares the same professional audience as SLL and co-develops lighting knowledge that SLL members apply.
• IEEE Industry Applications Society: Technical society within IEEE covering industrial applications including lighting electronics. Adjacent peer: overlapping technical membership, publications, and standards activity in lighting technology and applications.
• Society of Building Services Design Engineers: UK body focused on building-services design. Adjacent peer: shares audience with SLL inside CIBSE-adjacent building-services community but focuses on broader MEP design rather than lighting specifically.

Broad incumbents

• ASHRAE: Global building-services society within which lighting is one topic. Peer in the broader CIBSE-equivalent building-services space, sharing the same CPD, journal, and standards ecosystem that SLL participates in.
• The Lighting Industry Association (LIA): UK trade association representing lighting manufacturers and the supply chain. Peer in that it serves the same lighting ecosystem; differs from SLL by representing industry rather than individual professionals — already a collaboration partner on Sustainability Unfiltered.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/SLL100
• YouTubeyoutube.com/channel/UC9yKD_y9B-kbHDcgub1H1JA/feed
• Facebookfacebook.com/CIBSE
• LinkedInlinkedin.com/company/sll-society-of-light-and-lighting
• Instagraminstagram.com/sll100

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SLL - Society of Light and Lighting