On Apr 5, 4:20�pm, "Percival P. Cassidy"
wrote:
I replaced some existing incandescent bulbs by LED bulbs, then noticed
that they do not switch off completely but still glow dimly.

Checking the voltage at the lamp socket with a high-resistance
electronic multimeter, I get a reading of 48v!! A few volts might be OK
-- induction, stray voltages, etc., but 48V!!!

This occurs in two different rooms, but I think the various lighting
circuits are all connected to one breaker.

What could cause this?

Perce

its the meter, take a walk around high sensitivity meters will show 60
volts under the neighborhood power line........

connect a 100 watt light bulb with the meter voltage will go away.

relax yours must be one of the most frequent questions asked.