1. mmoathudi

    Thread Starter New Member

    May 9, 2008
    I've CFL bulbs that only flash when connected to a dusk-to-dawn sensor. They opearate as if they were connected to a flasher circuit. What could be causing this because the sensor is not faulty as it works with incadescent bulbs and the bulbs work perfectly when connected in normal circuit. On the box it is cautioned that they are not suitable for dimming, electronic switches,photocells, timing devices and dusk-to-dawn sensors.
    Can you explain this please, because from the operation side of the CFLs, I don't see how such devices can prevent them from working.

    "Trying to find my feet, but forced to run".
  2. jpanhalt


    Jan 18, 2008
    This question has come up before and there was no fully satisfactory answer. One hypothesis is that the CFL is so bright at the wavelength that the photocell senses, unlike incandescent bulbs, that it activates the sensor to turn the light off again.

    Another possibility is that the current draw of the CFL is too low to keep the switch conducting, which causes it to reset.