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Rampage_Rick t1_j5bxi0i wrote

Reply to comment by PurveyorOfUselesFact in The Lights Have Been On At a Massachusetts School For Over a Year Because No One Can Turn Them Off by AStartIsBorn

Since they say it dimmed throughout the day, I'm going to assume that it was a 0-10V control system. Probably each room was on it's own 0-10V channel, daisy-chained between each luminarie. Power for luminaries could come from any number of branch circuits (probably 277V)

Master controller fails, every channel goes to 10V, everything goes full bright.

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