ENERGY
March Foods warehouse lit by HPS on left and then by LED on right.
FOOD WAREHOUSES SAVE CO WITH CARBON TRUST FUNDE
or the last three years Managing Director Paul Cope of UK based March Foods had been looking for a way to reduce energy consumption in his warehouses. After rejecting voltage controllers as old technology, he began to examine LED lighting as a potential smart solution. In January 2010 he knew he had found the answer when installer Tom Klimes of Interior Control Ltd presented him with an LED High Bay unit from Dialight, a UK based company specialising in applied LED technology.
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THE LIGHTING CHALLENGE Paul Cope describes the problems he wanted to solve: “We had two 3,250 square metre (35,000 sq ft) warehouses with a total of 84 x 450W HPS lamps operating 24/5 and Saturdays. Even though we are not constantly in and out of all bays in the warehouse all the time, the old lamps couldn’t be switched off as they
44| SUSTAINABLE FM | NOVEMBER 2010
“Lord Lucan could have hidden in our warehouse.”
took 10-15 minutes to re-strike, so I wanted a more energy efficient solution. And to be honest, the lighting was getting so that Lord Lucan could have hidden in our warehouse!” “Then there’s the maintenance problem. With 15 metre high ceilings (49 ft) you need to bring in a cherry picker to replace failed lamps and you can’t have people working underneath. That means we’d typically wait until 4-8 lamps had failed before hiring the scissor lift over a weekend to replace them. This was costing about £2,000 annually.” “On top of that the HPS lamps are fragile and hang about 4-5 feet from the ceiling, so that just puts them in the range of an extended pallet truck. It was quite common to lose a few of them that way.”
HOW THE CHALLENGE WAS OVERCOME WITH LED LIGHTING Interior Control replaced the 84 x 450W HPS lamps on a one-to-one basis with Dialight’s DuroSite™ Series LED High Bay. This highly robust 150W fitting features eight arrays in a compact oval pattern that enables it to direct light efficiently with less wastage and delivers an immediate saving in power of 66%. Unlike HPS, the LED lighting has
instant-on ability, so it works well with occupancy sensors and this has further increased energy saving to 72% as well as reducing carbon emissions by over 100 tonnes per year. The oval pattern of the arrays also means less wasted light on racking and more directed at floor level in the aisles where 110 lux was measured
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