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LED Retrofit Conversion of Internal and External Lighting- HMP Risley

Customer: MOJ / HMPPS

Our Energy Service Team undertook a review of the 58 prisons we maintain on behalf of the Ministry of Justice (MOJ) to identify areas where energy efficiency improvements could be delivered to both enhance and improve operations and contribute towards the MOJ’s carbon reduction targets.

HMP Risley was chosen as a test site because its building fabric is similar to a large proportion of the UK custodial estate, allowing the project to be easily replicated.

To ensure successful delivery, we worked closely with the MOJ, as well the prison Governor and her team, ensuring minimal impact to the delivery of custodial services and making sure the programme was completed on time and within budget.

Together with our supply chain partners PHS, CEF and Tamlite, we designed an innovative energy-efficient LED lighting solution that could be retrofitted into the existing 5,500 metal halide and sodium SON fixtures in the prison.


What did we do?

This retrofit solution helped:

– Reduce lead time and overall programme timescale – allowing the project to complete in just 3-months

– Limit the capital cost while still complying with MOJ technical standards, ensuring that anti-ligature and anti-vandal fittings are installed in all prisoner facing areas

– Reduce industrial waste by using the existing lighting infrastructure


What was the impact?

– Lower energy costs, saving around £169,251 per year

– CO2 emissions reduced by 583 tonnes a year

– Maintenance costs anticipated to be 50% less with new fittings lasting over 10 times longer

– None of the reliability issues associated with an aged electrical infrastructure

– Improved safety and security through increased light levels along with a reduction in radiant heat on the prison’s wings and external courtyard in line with the safety and decency agenda, helping to minimise staff and prisoner fatigue

– Reduced vandalism costs because the new LEDs in cells are significantly harder to damage and tamper with than fluorescent luminaires

– Minimal operational impact because of the speed of installation

– Improved feel, décor and ambience in line with the clean and decent agenda

– Direct engagement with Amey as a single provider reducing third party project sponsorship involvement and cost

We are now in discussions with MOJ about rolling this approach out across the prisons we maintain in support of their Net Zero roadmap.


John Cole, Head of Sustainability, Ministry of Justice:

“Reducing the carbon footprint of our custodial estate is part of our wider strategy to reduce ours and the government’s environmental footprint. The work undertaken at HMP Risley by Amey now provides us with a cost-effective model that we can use across all our custodial estate with minimal disruption to operations.

“The environmental impact this project will have in helping us reduce CO2 emissions isn’t the only benefit. The new LED lighting system will also help to reduce the cost of utility bills and maintenance within our prisons portfolio, as well as providing a safer, healthier and brighter environment for both prisoners and prison staff due to the increased the quality of light.”