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![John Lewis and Waitrose to dim lights and cut temperatures to save energy | John Lewis | The Guardian John Lewis and Waitrose to dim lights and cut temperatures to save energy | John Lewis | The Guardian](https://i.guim.co.uk/img/media/786143db12f1911f45f9116c23f50a7aac93d90f/0_52_5395_3237/master/5395.jpg?width=1200&quality=85&auto=format&fit=max&s=359f7c885c2e082e465d54b1e56b9c63)
John Lewis and Waitrose to dim lights and cut temperatures to save energy | John Lewis | The Guardian
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