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Christmas lights are shining bright up and down the county, but there have been some negative headlines when the chairman of the All Party Parliamentary Group on Dark Skies suggested people should consider toning them down this festive season. But how much energy do these displays waste - and is it really a waste if we're brightening up our streets for just a few weeks and bringing smiles to faces in these dark times? Bob Walker reports. Winifred Robinson presents. First broadcast on You & Yours, 13 December 2021.