Radiance35

What Radiance35 does

Radiance 35 is a privately held lighting design and urban planning consultancy founded by architect Isabelle Corten and headquartered in Liège, Belgium, with offices in Brussels and Aubagne, France (Radiance 35 Sud). The firm delivers public-sector lighting projects across Belgium, Switzerland, France, and Luxembourg, including city-wide light master plans, architectural illumination of heritage buildings and civic landmarks, transport infrastructure lighting (tramway stations, tunnels, bridges), festive and ephemeral installations, and participatory community engagement programmes built around night walks, citizen workshops, and the proprietary NoctUrne board game.

The firm's core technology stack combines LED hardware, dynamic dimming systems, and ecological lighting protocols (trame noire mapping, partial extinguishment, colour temperature control) integrated through formal partnerships with manufacturers such as Schréder and academic collaborators including the University of Liège via the Interreg V Smart Light-Hub programme. The agency's intellectual property sits primarily in its participatory design methodology and accumulated portfolio of 100+ documented projects rather than in patented software or hardware, and it has won multiple ACEtylène awards (2020, 2021, 2022, 2025) and the inaugural ACE Prix de l'imaginaire.

Radiance 35 operates a B2G professional services revenue model with project-based fees for commissioned public works, supplemented by advisory, training, and conference speaking revenues. Customer segments span municipal and city governments (primary), transport and mobility authorities, real estate developers (e.g., Ardent Group), and cultural institutions (e.g., Antwerp Opera). All projects flow through public procurement or direct commission by public institutions, with no consumer-facing channels and no disclosed pricing or revenue figures. Marketing relies on industry thought leadership, ACE conference participation, earned media coverage in Belgian and Swiss press, and academic co-direction of the Executive Master in Light Engineering at La Cambre-Horta.

Name

Radiance35

Legal name

Radiance 35

Website

https://radiance35.eu

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Radiance 35 is a Liège-based lighting design consultancy serving European municipalities and public institutions with urban light master plans, architectural illumination, and ecological lighting design across Belgium, Switzerland, France, and Luxembourg.

Ownership category

akta.pro rank

Product category

Lighting Design Services

NAICS

Landscape Architectural Services (541320)

akta.pro primary industry

Lighting Design Services (BPAHAKAJ)

akta.pro secondary industry

Landscape Lighting Design & Layout (HSAIAHAA)

Keywords

• Urban lighting design
• Light master plans
• Architectural illumination
• Public lighting consultancy
• Ecological lighting design

Headquarters

HQ city

Liège

HQ country

Belgium

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Public Lighting Master Plans: Long-term strategic lighting master plans commissioned by municipalities and city governments. These multi-year mandates cover city-wide light strategy development, including trame noire mapping, light zoning, and implementation roadmaps.
2. Architectural and Urban Lighting Design Projects: Design and supervision of lighting installations for public buildings, squares, streets, tunnels, bridges, monuments, and cultural venues. Revenue is project-based, typically commissioned by public contracting authorities (municipalities, transport operators, public institutions).
3. Ephemeral and Event Lighting Installations: Temporary light installations for festivals, seasonal events (Christmas illuminations), and cultural events. Includes participatory light happenings and artistic installations commissioned by cities and event organizers.
4. Light Plan Consultancy and Training: Advisory services, academic programmes (Executive Master in Light Engineering at La Cambre-Horta), conference speaking, and expert consultancy for other lighting design firms and public bodies.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

Radiance 35 is a professional lighting design agency that creates urban, architectural, and landscape lighting projects for public sector clients. The firm develops city-wide light master plans, designs architectural illumination for civic and heritage buildings, delivers public realm and transport infrastructure lighting, and produces temporary event and festival installations. Services are commissioned by municipalities, city governments, public transport operators, and cultural institutions across Belgium, Switzerland, France, and Luxembourg.

Product overview

Radiance35 is a lighting design consultancy specializing in urban planning, architectural lighting, and landscape illumination. The agency operates as a single integrated service offering rather than a platform-plus-modules architecture. Their portfolio encompasses city-wide light plans, architectural façade lighting, public space illumination, festive winter installations, and temporary light events. Projects span municipalities across Belgium, Switzerland, and France, with the agency notably working on tramway infrastructure lighting in Liège, heritage building illumination (Opera in Antwerp, cathedrals), and participatory lighting workshops for community engagement.

Differentiator

Problem solved

Functional benefit

Brands

• Radiance 35 Sud: French office/regional entity of Radiance 35 based in Aubagne (Marseille), France, handling projects in the southern region.

Products and services

• Public Lighting Master Plans Multi-year strategic mandates covering city-wide light strategy development, including trame noire (dark sky) mapping, light zoning, biodiversity-preserving dimming protocols, and implementation roadmaps. Commissioned by municipalities and city governments across Belgium, Switzerland, France, and Luxembourg.
• Architectural and Urban Lighting Design Design and supervision of permanent lighting installations for civic buildings, public squares, streets, tunnels, bridges, monuments, and cultural venues. Project-based commissions from municipalities, transport operators, and public institutions.
• Ephemeral and Event Lighting Installations Temporary light installations for festivals, seasonal events (including Christmas illuminations), and cultural happenings, including participatory light events and artistic installations. Commissioned by cities and event organisers such as Bright Brussels, Mons en Lumières, and the Festival de Genève.
• Lighting Consultancy and Academic Training Advisory services, academic programmes including the Executive Master in Light Engineering at La Cambre-Horta (ULB), conference speaking, and expert consultancy for other lighting design firms and public bodies.

Quantifiable outcome

• Liège Office Center project won the ACE Built Heritage Prize 2020, demonstrating industry recognition for quality of design
• +3 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• SM SWECO BelgiumminorImplementation/ SI/ Consulting PartnerRadiance 35 acted as a subcontractor to SM SWECO Belgium for the lighting design of the Belliard and Loi tunnels in Brussels (Bruxelles Mobilité project, 2019–2020). SWECO provided engineering and project management services with Radiance 35 responsible for the lighting design component.
• Karbon' architecture et urbanisme and Atelier 4DminorImplementation/ SI/ Consulting PartnerRadiance 35 worked as a subcontractor to the Karbon' + Atelier 4D architecture consortium for the Pogge neighbourhood public space project in Schaerbeek (2018–2024). Radiance 35 provided specialist lighting design services within the broader urban renewal contract.
• JNC InternationalcoreStrategic or Co-development PartnerRadiance 35 collaborated with landscape architects JNC International for the complete redesign of the 4-hectare Abbey site in Saint-Amand-les-Eaux, France. The project combined heritage lighting of the Abbey Tower with landscape integration and public realm redesign. JNC provided landscape architecture expertise while Radiance 35 delivered the comprehensive lighting concept.
• Noctabene, LighteConcept, E2C, and ArteliacoreStrategic or Co-development PartnerRadiance 35 worked in formal association with Noctabene, LighteConcept, E2C, and Artelia on the S.D.A.L. (Schéma de Développement de l'Aménagement de la Lumière) for the Métropole de Grenoble (2018–2020). This 49-municipality metropolitan lighting master plan involved guiding all municipalities in implementing light modulation recommendations, with Radiance 35 responsible for lighting technology advice.
• ENGIE Fabricom BelgiumminorImplementation/ SI/ Consulting PartnerRadiance 35 acted as subcontractor to ENGIE Fabricom Belgium for the scenic lighting design of the Annie Cordy tunnel in Brussels (2019–2021). ENGIE Fabricom served as the main contractor for tunnel infrastructure works with Radiance 35 providing specialist artistic and scenic lighting design.
• Elettra BordonarominorStrategic or Co-development PartnerRadiance 35 collaborated with lighting designer Elettra Bordonaro on the Grote Markt and Oude Markt squares project in Leuven (2017–2021). The project featured a participatory workshop process and differentiated atmospheric lighting for the two squares.
• Université de Liège (ULg)minorStrategic or Co-development PartnerRadiance 35 collaborated with the University of Liège (Smart Light-Hub project, Interreg V A Grande Région programme) and participated in academic activities including the Smart Light-Hub active night walk in Liège, with Caroline Poisson (ULg) as the filmmaker.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Arup Lighting: Global engineering and design firm with a dedicated lighting design practice serving urban infrastructure, transport, and civic clients. Larger incumbent competing on integrated multi-disciplinary bids where Radiance 35 currently operates as subcontractor.
• Signify (formerly Philips Lighting): Global lighting manufacturer and solutions provider offering city lighting services, smart city platforms, and turnkey municipal lighting programs. Larger incumbent whose bundled offerings compete with specialist design studios on public-sector tenders.

Direct peers

• Speirs Major: Award-winning UK lighting design practice with strong European project presence across public realm, heritage, and infrastructure. Comparable specialist studio delivering master plans, architectural illumination, and masterplanning services.
• L'Observatoire International: New York-based lighting design firm with strong cultural and public-realm portfolio. Comparable specialist studio offering architectural lighting, urban illumination, and master planning services to institutional clients.
• Licht Kunst Licht: German lighting design practice specialising in architectural, urban, and museum lighting across Europe. Comparable mid-sized specialist studio working with public and cultural sector clients on master plans and architectural illumination.
• Bartenbach: Austrian lighting design and research firm focused on daylight and artificial lighting for buildings and urban environments. Comparable specialist consultancy with a similar emphasis on integrated, ecologically informed lighting solutions.
• Tillotson Design Associates: US lighting design consultancy with notable work on civic, cultural, and public-realm projects. Comparable specialist studio of similar size and positioning within the architectural lighting design market.
• 8'18'' Lumière: Paris-based 'concepteurs et plasticiens lumière' led by François Migeon, a French lighting design firm of comparable size and philosophy. Cited directly in Radiance 35's own materials as a peer collaborator for joint conferences on architectural and landscape lighting, indicating directly overlapping scope and client base.
• ACT Lighting Design: International architectural lighting design consultancy working on museums, civic buildings, and urban master plans. Comparable mid-sized specialist studio delivering design-only services to public and cultural clients in the same lighting design category.

Others

• Schréder: Leading European outdoor lighting equipment manufacturer collaborating with Radiance 35 on the Smart Light-Hub Interreg project and multiple municipal installations. Equipment supplier and ecosystem partner rather than direct design competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/radiance35

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 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 Radiance35