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Precise Cycle Controller without display

A precision cycle timer that allows lighting duration from 8 to 18 hours and darkness duration from 6 to 16 hours. Allows to set a complete day-night cycle from as short as 14 hours or as long as 34 hours. Cycle timer with photocell Day and night operation or day only On cycles from 1/2 minute to 30 minutes Off cycles from 1 minute to 12 hours