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Chwiliodd Google a chael hyd i'r isod. Yn anffodus, doedd dim gair am darddiad y term. Brown-out .... What is it? Brown-out is a condition of lower than normal power line voltage being supplied by your local utility or generating equipment. This condition may be short term (minutes to hours) or long term (1/2 day or more). A power line voltage reduction of 8 - 12% is usually considered a Brown-out. Berwyn ----- Original Message ----- From: Geraint Lovgreen To: Berwyn Prys Jones Sent: Wednesday, February 05, 2003 3:12 PM Subject: "brown-outs" sgen i ddim syniad be ydi "brown out" - rhyw fath o ddiffyg trydanol a ddigwyddodd yn America yn 2001???