Strobing downlighter

Pip · Oct 11, 2019

I know nothing about this install but a phone call from a friends daughter in studet rented house in London.
Downlights in her bedroom and switched off but one light strobes at full brightness.
Whats going on?

DT1991 · Oct 11, 2019

Have connections and voltages verified.

With switch on and off.

Edit - remember some time back a batch of gu10 would be partially lit even with no voltage?? No explanation just changed lamp.and job done

Strima · Oct 12, 2019

Induced voltage from other circuits, voltage rises to a point where the driver can fire up the LED which discharges the driver capacitor for the cycle to start over again.