LED installation at The Brewery Shopping Centre, Case study

Subject: Energy Efficiency Date: 29th July 2014

Project Outline

 The aim of this project was to replace all 245 existing Mall and Atrium light fittings from original 150w/70w Metal Halide discharge light fittings (or 'bulbs') to more energy efficient LED.

 The Installation was managed over a two week period by the contractors HSL Group Ltd.

 Access equipment was run on mains electricity not on diesel, so to reduce the environmentally impact of the project works.

 The works were carried out outside of normal working hours reducing any inconvenience to customers or the day to day running of the centre, this method worked well on site with disruption was kept to a minimum.

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Technical Detail

 A lighting survey, carried out prior to the works, highlighted the high electricity usage of the original lighting scheme in the public areas. The project aim was to replace existing metal halides with a new LED scheme powerful enough to illuminate the required areas, between 40 and 60 feet from the ground, and ensure the light output was strong enough to achieve the set requirements.

 The lighting overspill from other shops/windows within the centre were taken into account. The 30w LED down lights have a lumen output of around 3,050 lumens as opposed to the original lighting scheme which had around 12,000 lumens. and Atrium areas were found to receive enough natural daylight/overspill from other areas to make the project work.

 The new LEDs installed are Rye plry30led recessed LED down-lights 200mm in diameter.

Project Cost

 60 30w LED in Atrium Total including access equipment £12,531.00

 185 30w LEDs in Mall Total including access equipment £38,269.00

 The return on investment period to recoup the installation cost is outlined at less than 2 years.

Benefits

 The installation of the LEDs has resulted in a marked improvement in the lighting levels achieved throughout the Mall and Atrium despite the reduction in the overall lumen level throughout the areas, and is providing savings of between 73% - 75 % on energy running costs.

 Another benefit of the LEDs is that of the savings on maintenance costs, as these are also reduced due to the life expectancy of the LEDS at over 30,000hrs or 3.42 years. This is approximately twice that of a standard Metal Halide discharge lamp at 15,000hrs or 1.71 years approximately.

Challenges

 The challenge at the Brewery was finding an LED which could produce the required spread of light at the ground floor as the pitch of the ceiling slops from 40 feet up to 60 feet in the Atrium section.

 The new lighting also had to be of comparable size to the original scheme to reducing the time required to install the new fittings and the necessity to make good the ceiling around each fitting saving a substantial amount of time, money and embodied carbon required for this project works.

Lizzie Batchelor Alan Page Sustainability Manager Sustainability Consultant 33 Margaret Street 33 Margaret Street London W1D 0JD W1D 0JD +44 (0) 20 7877 4656 +44 (0) 20 7299 3066 [email protected] [email protected]

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