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 | Lights buzz on low dimmer settingInstalling a metal roofFrom: S.K.B.83@juno.com CommentsWe would like to know what you need to do to put a metal roof over existing shingles. The roof is about 25 years old. Thanks! From: chan@metsun1.sjsu.edu CommentsOur lights buzz when they are on a low dimmer setting. This buzzing seems to go away when the lights are on the highest setting. What is causing this buzzing and how can we stop it? 
 
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