Ministry of Justice HMP Risley LED Retrofit Conversion

Image of a prison hallway
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A lighting upgrade at category B HMP Risley was used as trial for improvements across the Amey-managed prison estate.  

This £1.35 million LED upgrade covered 90% of the prison, giving an indicative ROI of around 7.7 years and carbon savings of 538 tonnes a year.  

Working with supply chain partners, Amey designed a bespoke solution to convert the existing metal halide and sodium SON fixtures and retrofit 5,500 units of the prisons existing lighting stock with energy-efficient LED lighting. The upgrade – involving the ‘change out’ of 5,500 fittings - supported the ‘clean and decent’ agenda and was delivered in only three months. 


This delivered impressive cost and environmental benefits including: • Lower energy costs, saving around more than £169,000 per year  

  • A 583 tonne reduction in carbon emissions per annum 
  • A 50% reduction in lighting maintenance costs with new fittings lasting more than 10 times longer 

Other tangible benefits include improved reliability, safety and security benefits and a reduction in vandalism and associated costs because new LED fittings are harder to damage. 

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