Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Lightbulb flashes though power should be off

  • 07-03-2020 5:28pm
    #1
    Registered Users Posts: 9


    I have a lightbulb in the landing of my house, connected to a standard
    fitting. If you turn on the light, the bulb radiates light as it should.
    If you turn off the light, the bulb seems to go dark; but if you stay and
    watch it, you see that it gives a faint, brief flash at regular intervals of
    about 5.7 seconds.

    The flash is not throughout the entire bulb, only in the upper part.

    The bulb is a CFL bulb. The following is written on it:

    PHILIPS
    TORNADO ESaver
    20W WW 827

    Why is this flashing happening, and is it cause for concern?
    Tagged:


Comments

  • Closed Accounts Posts: 94 ✭✭Michelinextra.


    It might have to do with the 2-way switching.

    The strappers and capacitance, I forget the exact details


  • Registered Users, Registered Users 2 Posts: 5,822 ✭✭✭This is it


    Issue with the neutral?


  • Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    It is likely the capacitance effect of the 2 way strappers as said. Try a different cfl or led bulb in it.


  • Registered Users Posts: 9 Try Harder


    I tried a different CFL bulb. It doesn't flash. Does that mean that the only problem was that the first bulb was bad?


  • Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Try Harder wrote: »
    I tried a different CFL bulb. It doesn't flash. Does that mean that the only problem was that the first bulb was bad?

    It was probably just more sensitive to 2 way switching capacitance effect.

    Assuming it was on a 2 way switching setup, try it somewhere that only has 1 switch. It might be fine there.


  • Advertisement
  • Registered Users, Registered Users 2 Posts: 149 ✭✭Delta Lima


    ⁸I had a similar problem to this with a landing light. The LED bulb
    would glow quite noticeably, when it should have been off.

    My solution was to wire in the coil of a little contactor in the attic,
    in parallel with the bulb. ( The contactor didn't have to switch anything)

    That did the trick.


Advertisement