Streetlight trial is cutting energy use, emissions and costs – but there are concerns

An ongoing street lighting trial is on track to deliver major savings in energy, carbon emissions and costs – and a decision is due to be made early next year to decide whether to make the changes permanent.

Members of Devon County Council’s (DCC) Corporate Infrastructure and Regulatory Services Scrutiny Committee on Thursday (November 20) heard that the year-long trial, which began in April 2025, introduced earlier switch-off times and ‘deeper’ dimming across Exeter, market towns and rural areas.

Using DCC’s new Central Management System, lighting levels have been cut by 60 per cent during off-peak‑ hours, with lights switched off for longer overnight.

Figures show electricity use for street lighting has dropped from 11.6 million kWh in 2024/25 to a projected 10.5 million kWh in 2025/26 – saving around £270,000 and 200 tonnes of carbon in a single year.

The changes also support wildlife by reducing light pollution and disruption to nocturnal species.

However there have been concerns that earlier switch-off times could impact shift workers.

Following discussions with police and the town council, lighting hours were adjusted on key routes. Devon and Cornwall Police have otherwise backed the scheme, praising the council’s responsiveness to local safety issues.

Cabinet is due to make a final decision in February 2026. If approved, the trial regime would become permanent, placing Devon among the leading authorities in sustainable street lighting.