Illumination and impact: measuring social impact via app


    September 28, 2020


    Use the power of data to understand how the Illuminated River Project is attracting and engaging visitors


    Lighting landmarks in public spaces has an emotional impact on people. Whether the intention is to create public art or to use it as a means of visual identity, lit landmarks look fantastic and help build a sense of community and pride, enhancing the well-being of the people living and visiting the area. However, it’s not easy to quantify this social impact.


    The Illuminated River Foundation (IRF) set out with these very goals by lighting up to 14 of London’s iconic bridges. Once complete, it will be the longest public art project in the world and will be seen by over one billion people over its 10-year lifespan.


    Renowned artist Leo Villareal designed the subtly moving sequences of LED light to reveal the beauty of the existing architecture of the bridges, their relationship to the River Thames beneath and the surrounding neighbourhoods.

    What role does data play?


    Having launched phase one of the project in July 2019, the IRF wanted to understand the impact this project was having on the people who lived in the area and the tourists who were visiting, and what their appreciation was of the new bridge lighting as a form of art.

    Social listening via the Social impact app allows us to capture how people respond to the artwork and provides valuable insight. By linking how people interact with the artwork with changes in perception, attitudes and behaviours, we can show how the artwork benefits wellbeing, encourages civic pride and, in turn, learn from their interactions.” 


    Pak Ling Wan

    Illuminated River Foundation

    What is the Interact Landmark’s Social impact app?


    Interact Landmark's Social impact app crawls websites and listens for relevant, site-specific and publicly available information. It then collects, aggregates and displays real-time information using different data views on the dashboard to provide meaningful insights. The app collates a vast amount of real-time data from over 100 million sources, including social media channels like Twitter and Instagram and other public internet sources like news sites and blogs.


    Traditionally, impact assessment has been done using online searches or questionnaires, which can be laborious and provides a limited snapshot, offering insights that quickly become outdated. In comparison, the Social impact app provides continuous, real-time monitoring and analytics, and provides both current and historic trends to measure the social impact.

    What’s the technology behind it?


    Dashboards are configured by Signify specialists using information collected through an onboarding process, where project details, user requirements and objectives are collected. The configuration consists of setting up queries to collect data specific and relevant to the lighting project and filter results by specific keywords, and filter out undesirable (for example, expletive comments) or irrelevant posts.


    The dashboard displays the following data analytics, making it simple for any user to glean key insights and propose actions to adapt the lighting installation to improve visitor experience. The analytics displayed include:


    • ‘Volume’ provides insights into the number of mentions with any emerging trends automatically detected using AI (artificial intelligence)
    • ‘Topics’ reveal dominant and trending topics using text mining of mentions
    • ‘Authors’ show the demographics of people posting and highlight prominent influencers who have amplified the message or are expressing impactful opinions
    • ‘Coverage’ reveals the geographical regions and online platforms the users are engaging from
    • ‘Sentiment’ is classified as positive, neutral or negative, giving insights into the underlying nature of user engagement
    Social impact app lightinggraph

    Figure 1: Volume of mentions vs time showing significant peak around the week the bridges were lit in Phase one.

    NOTE: London Bridge, Cannon Street Bridge, Southwark Bridge and the Millennium Bridge were lit in phase one on July 17, 2019.

    Social impact app positivegraph
    Figure 2: Sentiment of mentions showing significantly positive sentiment around Illuminated River lighting.

    Who are users of the Social impact app?


    Users of the Social impact app vary from city officials, tourist bureaus, to PR and marketing firms – anyone involved in understanding the impact their landmark lighting has on people in their city. For the iconic Illuminated River project, the two active users are the Illuminated River Foundation and Caro Communications.

    “At Caro Communications we have used the Social impact app to gather advanced insights into the impact of Illuminated River in real time and across the globe. It has played a crucial part in being able to quantify reactions to the Illuminated River artwork, allowing the team to engage more actively with online audiences.”

    Social impact app wordbank
    Figure 3: Topic mining of Illuminated River lighting mentions (April-May 2020).

    “The app has also allowed us to see the far-reaching nature of the artwork and identify relevant trends, conversations and news stories. In April 2020, monuments across the UK and America, including the Illuminated River bridges, were lit blue to honour healthcare workers during the COVID-19 pandemic. Using topic mining and monitoring mentions on the Social Impact app, we were able to see that Old London Bridge in Lake Havasu, Arizona had also turned blue and thus engage and support their local community as well as Londoners,” said Catrin Podgorski from Caro Communications.


    To learn more visit the Illuminated River Project website or find out what’s possible with the Social impact app.

    About the author:

    Ashish Pandharipande

    Ashish Pandharipande

    Research & Development Engineer

    James Anderson

    James Anderson 


    Sub Segment Manager for Bridges, Monuments and Facades

    For further information, please contact:

    Signify Global Integrated Communications
    Neil Pattie
    Tel: + 31 6 15 08 48 17

    About Signify


    Signify (Euronext: LIGHT) is the world leader in lighting for professionals and consumers and lighting for the Internet of Things. Our Philips products, Interact connected lighting systems and data-enabled services, deliver business value and transform life in homes, buildings and public spaces. With 2020 sales of EUR 6.5 billion, we have approximately 39,000 employees and are present in over 70 countries. We unlock the extraordinary potential of light for brighter lives and a better world. We achieved carbon neutrality in 2020, have been in the Dow Jones Sustainability World Index since our IPO for four consecutive years and were named Industry Leader in 2017, 2018 and 2019. News from Signify is located at the Newsroom, Twitter, LinkedIn and Instagram. Information for investors can be found on the Investor Relations page.

    Meydan Bridge

    More blogs

    • Disinfecting the air we breathe with UV-C light

      June 21, 2021

      Disinfecting the air we breathe with UV-C light

    • Creating a platform for a smarter New York

      June 16, 2021

      Creating a platform for a smarter New York

    • Is global climate action reaching a tipping point?

      May 31, 2021

      Is global climate action reaching a tipping point?