The occupancy sensor must calibrate itself every time power is removed and reapplied. The light will sometimes come on for 30 seconds then shut off for around two minutes during the calibration process. After the calibration process, the light will operate normally. If the light was off when power was removed the light will stay off for the first 30 seconds then stay off for the two minute calibration.
Because of this calibration process, we recommend not using a toggle switch for power on a light with occupancy sensor. It is best to use the light with a continuous power source and let the occupancy sensor turn the fixture on and off.
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