Leds bulbs glow slightly when the power is off

pieroabcd

Hi,
I've replaced all halogen bulbs with led lights and I've noticed that on the 2 2-way switches (one is a dimmer+switch) the leds remain slightly on even when the power is off.
No such thing on the other bulbs (all connected to dimmers).
I've read that it can be due to the switches having inverted the phase with the neutral or maybe due to the lack of grounding. 
What I don't understand is if - left as is - there are risks for the electric circuit. Can it be left as is or does it need a correction?

grumbler

Are all your dimmers identical?
Anyway, I don't think there are any risks.

Grenage

There are no risks.  I believe it's normally down to induced current.

If I remember rightly, some folks add resistors to stop it happening.

pieroabcd

Ok, thanks

Jonboy_1984

How old are the dimmer switches, we had some fun and games with one because it had a minimum rating for the draw of the bulbs connected to it (on the back it said 40w to 2000w load) and the LEDs we put in totalled 12w.

pieroabcd

I think 7 or 8 years old, when this house was renovated 

Ayr_Rage

Induced current or switched neutrals rather than live,

I have square LED panel lights in suspended ceiling tiles in my overseas property and they all emit a faint glow when off.

Ectophile

It's a common problem with 2-way switching, as a result of the long cable run between the two switches.  For anyone electrically minded, the two switched lives between the switches act like a capacitor (as there's two long wires with an insulator in between), and a tiny amount of AC current can leak through that capacitance from one wire to the other.

It's not really dangerous, just annoying.  Some LED lamps have an extra component in them to stop this happening.  It's also possible to add an extra component into the wiring at the ceiling rose, but you have to know what you're doing.