landing light

[Johno]

Hello all, i went to a job today and the landing light was flashing on slightly, approx every 20 secs or so, (by the way, this was when the light was off), it had a low energy bulb in. This doesn't happen when an incandescent bulb is fitted. Any ideas what is causing it? A friend has told me it is to do with the strappers inducing a voltage or something, but that doesn't make much sense to me really

 

[Guest123]

Your friend is correct.....it is to do with the voltage induced in the SL strapper of the 2 way switching feeding the lamp.

It buils up over a small time period (a few seconds usually) discharges (causing the flicker) and starts again.

You can buy devices to counteract this, alternatively try changing the lamp for another make sometimes works.

 

[Sintra]

Lyco do a range of cfl's with a built in diode to eliminate flicker.

1000s of Light Bulbs, Energy Light Bulbs & Light Fittings to choose from | Top Brands

 

[Jason Smith]

possibly a connection between the switch wires, minor short somwhere?

 

[Jason Smith]

Thanks you lot, never heard that one before, have written it in my book.

 

[Sintra]

It is normal if the 2 way switching is wired in the convetional method to have an induced voltage.

Alternative is to wire 2 way switching in the conversion method.

 

[Johno]

cheers, i always tend to wire in the conversion method, which must be why i have never come across it before.