Based in Welwyn Garden City Gilbertson & Page produces dog food for which it has held the Royal Warrant since 1884. In further recognition of its high standards, the company has received the additional accreditation of the international quality standard ISO9001:2000. Additionally it takes its responsibility as an energy user very seriously and was looking for ways to improve in that area. The lighting challenge “We wanted to become more energy efficient,” explains Chris Hill, Chief Engineer at Gilbertson & Page, “so we decided to look at alternative lighting solutions. In total we had 62 high pressure sodium fixtures, a mixture of 250W and 400W, throughout the factory, warehouse and outdoor area. The high pressure sodiums were regularly changed, but there were always one or two ready for

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