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there are all sorts of rules in eastern orthodox churches.
i went to a long vespers service in a russian church (no translation but a few of the songs were in english) and the subdeacons (i think that is what they were) went around extinguishing the candles at 2 points in the service. i asked someone about it and he tried to explain it but there was a big language barrier and i didn't get it.
maybe you could ask about it on 'orthodoxChristianity.net' where there are lots of EO Christians.