To save 90% on light­ing don’t switch off. Switch to LEDs.

Marl­bor­ough com­pany Pro­vin­cial Cold­stores saved nearly 95% of en­ergy used for light­ing, by mak­ing the switch to LEDs. The com­pany is now sav­ing $30,000 a year on its en­ergy bill, and us­ing the equiv­a­lent of just 40 50-watt halo­gen bulbs to light its en­tir

DEMM Engineering & Manufacturing - - EDITORIAL -

Pro­vin­cial Cold­stores is a 25-year-old busi­ness based at Blen­heim and Spring Creek. It pro­vides 60,000 cu­bic me­tres of frozen, chilled, warm and am­bi­ent stor­age fa­cil­i­ties, with a tem­per­a­ture range of -25° to +30°c.

The proudly lo­cal busi­ness pro­vides stor­age at all tem­per­a­tures for Marl­bor­ough’s many ex­port pro­duc­ers, from wine to mussels to cher­ries. Gen­eral Manager Don­ald Hor­ton hired Dig­i­tal Light­ing So­lu­tions (DLS), an Auck­land com­pany which de­signs and man­u­fac­tures LED light­ing for do­mes­tic and ex­port mar­kets, to de­sign and in­stall the new sys­tem.

Dave Reid of DLS ex­plains that while light­ing for a stor­age busi­ness may sound straight­for­ward, the re­quire­ments

were sur­pris­ingly com­plex be­cause of the va­ri­ety of prod­ucts stored.

“Each room had a dif­fer­ent lay­out and use, which pre­sented many tech­ni­cal chal­lenges. For ex­am­ple, in the large stor­age ar­eas we in­stalled fork truck emit­ters, which turn the lights on only where they are work­ing. As soon as you’ve left the lights can go off or dim – con­ven­tional mo­tion sen­sors stay on for longer.”

“We in­stalled mo­tion sen­sors for walk­ers in low-use ar­eas, so the lights weren’t on all day in places where peo­ple hardly ever go.”

“LEDs are par­tic­u­larly use­ful in cool stores - they pro­duce less heat than con­ven­tional lights, so your chillers don’t have to off­set so much en­ergy from the lights.”

DLS also used day­light har­vest­ing – light­ing con­trol sys­tems that are able to dim or switch elec­tric light­ing in re­sponse to chang­ing day­light.

Pro­vin­cial Cold­stores Gen­eral Manager Don­ald Hor­ton is ex­tremely pleased with the re­sult of their light­ing up­grade.

“We’ve had Dave down for anal­y­sis and we’re up to 90% in sav­ings,

and so much bet­ter light­ing – ev­ery­thing is sharper and clearer. The mo­tion sen­sors en­sure the lights are off 80% of the time so it’s great.”

LED light­ing uses much less elec­tric­ity to pro­vide the same light lev­els as con­ven­tional lights. It can be de­signed to de­liver sav­ings and safety en­hance­ments for most busi­nesses.

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