From Halogen to LED Lighting:

Illuminating 800-years of history

Enhanced illumination has revealed previously unseen details, such as remnants of medieval paint under the Triforium Arches within the Cathedral. Revd. Kenneth Padley, commended the team’s efforts, “I am delighted with the feedback received about the effect of the lighting for both worship and visiting. It balances illumination with atmosphere for liturgy, and there are parts of the building that our Guides can show off as never before – medieval paint under the triforium arches and the blocked doorway to the former glazing workshop above the Trinity chapel, to name but two.’’

Stepping into the Cathedral, one is instantly overwhelmed by the beauty of the architecture and the atmosphere. Looking up to the ceiling, details which were previously in the dark are now visible for all to enjoy and the 12th Century arches of the Triforium Level and Clerestory Level are perfectly illuminated using ERCO’s Optec New spotlights, creating an uplighting effect which brings the architecture to life. ERCO’s Parscan New 48V spotlights have been integrated 27 metres up, providing perfect illumination levels of the Cathedral floor below and its features such as the Nave and the Crossing.

Moving from Halogen to LED, has had a profound impact visually, environmentally and for safety. The replacement has significantly reduced fire risk and supported the Cathedral’s access priorities, improving illumination for those with impaired sight and mobility. The Cathedral previously had some dark areas, but with ERCO’s LED technology this heritage building now holds a warm and inviting atmosphere – it is truly a symbol of light.

Lighting the Future: 80% Energy Saving

Another significant benefit of the relighting, in addition to enhancing the visitor experience and also reducing fire risk, is its contribution to lowering the Cathedral’s carbon footprint. Addressing climate change remains a key strategic priority for the Cathedral and aligns with the Anglican Church’s mission to support the most vulnerable communities. Revd. Kenneth, commented, “Responding to climate change is an essential part of our responsibility to safeguard God’s creation. With the previous halogen lamps coming to the end of their natural life, our aim has been to reduce the Cathedral’s carbon footprint and provide high quality discreet lighting to showcase the building’s heritage.’’

The relighting has dramatically reduced the Cathedral’s carbon footprint, cutting energy consumption by over 80% internally and saving approximately 30 tonnes of CO₂ annually. Reflecting on the success of the project, Revd Kenneth expressed his gratitude: “The project has been everything that we could have hoped for and much, much more.”

Richard Clayton, Managing Director of Spectrum Electrical Group, spoke on the project, “Our team at Spectrum Electrical is honoured to have been part of Salisbury Cathedral’s internal relighting project. The remarkable results reflect the expertise and dedication of our team, the vision of Steve Thompson and ERCO, and the invaluable support from Kenneth, Gary, Phil, and the Cathedral team. We’re delighted that visitors will enjoy an enriched experience in this extraordinary space for years to come.”

Steve Thompson, Sales Director at ERCO UK Regional & Republic of Ireland, “At ERCO, we believe light has the power to transform spaces and inspire. Collaborating with Spectrum Electrical Group and Salisbury Cathedral on integrating our LED lighting solutions has been an honour. This project enhances the Cathedral’s architectural beauty while reducing its environmental impact and maintenance needs. As a central space for the community, we’re proud that our lighting contributes to moments of worship, reflection, and celebration—highlighting the vital role of light in shared experiences.”

This relighting initiative exemplifies how modern technology can honour a historic space’s legacy while addressing contemporary environmental and social priorities, ensuring Salisbury Cathedral remains a luminous landmark for generations to come.