This morning I was asked to look at a friends low energy 20W lamp (three hoops) that has just developed a flicker when turned off. About every 8 -
10 seconds there is a tiny flash at the base of one hoop. There is nothing obviously wrong with the wiring and no detectable voltage in the holder - is this likely to be due to inductive pickup in the wiring and a slight defect in the lamp. A replacement low energy (different make)is OK.
Peter