Car park project cuts light spill and benefits bats

A CAR PARK project has won an award for eliminating light pollution and improving the environment for the local bat population.

DfL specified warm white colour temperature of 3000K and a colour rendering of 80Ra throughout the scheme ensuring low blue light content, as recommended in the latest ILP guidance for Bats and Artificial Lighting.

The illumination of the car park at Dorothy House Hospice Care in Bradford-on-Avon has been awarded a Commission for Dark Skies ‘Good Lighting’ award for a design which respects the  habits of the Greater Horseshoe bat.

The project – a collaboration between Designs for lighting, DW Windsor and MJ Church –  is in an Area of Outstanding Natural Beauty and adjacent to Winsley Mines, a designated site of special scientific interest.

DfL identified that the existing lighting for the car park had uncontrolled distribution, high levels of glare and excessive spill light, resulting in complaints from adjacent residents.

Due to the sensitivity of the site and the need to minimise light spill at the boundaries, the area is lit to a lower level than ‘recommended’ car park standards.

This deviation from the standard was subject to a risk assessment and is successful due to the low traffic flow and speed.

A delighted Horseshoe bat yesterday Pic: Lylambda Photography

DfL specified warm white colour temperature of 3000K and a colour rendering of 80Ra throughout the scheme ensuring low blue light content, as recommended in the latest ILP guidance for Bats and Artificial Lighting.

Real innovation came from using a bespoke control solution and cutting-edge LED technology to ensure the right lighting was in operation at the required times of night.

When not in use, lighting is switched off, and when lighting was required to offer wayfinding back to cars late at night, a manually activated switch controls the lighting. This solution was the most efficient and robust from a cost and maintenance perspective.

The designer and manufacturer collaborated to design bespoke luminaire shields ensuring spill light achieved 0.5 lux at the sensitive boundaries.

Pharola Dark Sky illuminated bollards are located on the access ramp, providing low levels of amenity lighting for pedestrians accessing the car park extension.

The design achieves zero upward light from the installation and has an energy use of just 0.045W per square metre.

 

  • Learn more about exterior lighting at The Illuminated City conference at the LuxLive 2019 exhibition, taking place at ExCeL London on Wednesday 13 November and Thursday 14 November 2019. Entry is free - view the full programme and register free HERE.