Devon County Council replaces 400W SON floodlights on Exeter High Street with LED, saving 70% energy

The challenge

Not many high streets can claim such a rich history - dating back to the iron age - Exeter High Street was the first in Devon to have gas lighting installed in 1815. Widened and rebuilt in the 1950s, following the destruction of nearly two-thirds in the 1942 (World War II) bombings, it is now one of Devon’s favourite places for shopping, culture and leisure.

The compact mile of stylish boutiques and big-name-brands features wall mounted luminaires, which reduce street clutter and ensure a focus on people. Devon County Council (DCC) required an LED solution to replace the existing SON floodlights. Our brief was to match the existing light levels, lighting both the wide pavement and road, while reducing the high energy demands.

Clients and partners


  • Client logo Devon CC H160px


    Devon County Council

Key project requirements

  • LED alternative to 400W SON-T floodlights.

  • Dimming capabilities for further energy savings.

  • Reduce maintenance requirements.

The solution

Our wall mounted Katana provided the large lumen package required to light the vibrant shopping street, with exceptional efficiency (up to 174lm/W). Existing wiring connections were concealed within the product through a standard wall bracket modification. Katana’s unobtrusive modern design blending seamlessly with shopfronts and the mixed architectural styles found in the area.

Where possible the luminaires were positioned at a height of 10-12m, in existing locations, with a few minor relocations to alleviate future maintenance concerns and subsequently reduce operational costs.

A colour temperature of 4000K colour temperature was selected due to the high pedestrian flow and interaction with buses and cycles. This increased colour and visibility whilst aiding CCTV operation.

" By replacing the existing 400W SON-T lamps (449TCW), with Katana LEDs using 198W, we instantly saved 251W per luminaire, coupled with the introduction of the stepped dimming profile, we will achieve savings in the region of 70%. With energy prices continuing to spiral upwards the monetary savings will increase further with time "

Darren Kelly, Challenge Fund Manager, Devon County Council

Katana Urban range

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