I've got three Low Energy lamps (20 watt models). All of them audibly tick at a
rate of about 2Hz when switched off in any ceiling lamp socket in my house.

I've used a DVM (20 Meg ohms) to measure L-N, N-E, L-E voltages and there's only a
few mV indicated across any combination. Killing the lighting MCB kills the
ticking. Any ideas what's going on ?

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Mark
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