Why would there still be current present when the circuit is off?

[Gavthesparky]

A valued customer has replaced all his Halogen GU10's with LED replacement lamps. For some reason three lamps on one switched circuit remain on but very dim when the switch is off. This room is switched from 3 points and depending on which switch turns off the lamps this has an effect on the amount of light produced in the off position.

I hope this makes sense.

Things I have tried already.
Replaced the switches.
Checked to see if there is a borrowed neutral.
Tried other lamps. It is fine with halogens but I imagine the current is only slight so you cant see any difference.
Turned off other circuits to see if there proximity had any effect.

 

[telectrix]

tele my friend your calculation is out by a factor of 10!!!!!!!

so it is. bloody decimals.! 0.16watts. thought it looked high, but had to go out for a beer and when i got back, i'd forgot to recheck.

 

[Moses]

Reputo pro vos narro

It's going to be my new signature!. You may try to concider it.

I never learnt any Latin!!!

 

[Knobhead]

Ergo:
Think before you speak!