Led lamps are different though and in some cases that current may just be enough to actuate the circuitry in your lamp and cause it to glow albeit dimly when the light switch is off.
Led bulb lights with switch off.
Led lights flickering when switched off.
The reason for this can usually be found in the electrical wiring.
Short of rewiring your lighting one solution is to stick something in the circuit to mop up this unwanted voltage.
So when switching off the led lights then a very small amount of current passing through its internal circuit remains in its forever.
But it cannot glow the light fully so it flickers.
Moreover internal leakage in led bulbs is almost zero.
The afterglow issue is usually only visible after converting from old light bulbs to leds.
Some led bulbs are designed for use with standard dimmer switches while others are not.
When the dimmer switch goes off and on many times per second the led bulb becomes a flickering strobe light.
Led bulbs don t have glowing filaments.
Led light bulbs can be used in light fixtures controlled by dimmer switches but you may well find that traditional dimmers may not work or may work inadequately with some led bulbs.
Some fixtures such as under cabinet and recessed lights may need special led dimmer switches for proper performance.
This may be due to the type of light switch or dimmer or an incorrectly connected switch.
An incorrectly connected light switch or a switch with a night light can be responsible for flickering.
To get the benefits of led without replacing all your existing fixtures all you need to do is replace all your incandescent screw in lightbulbs with screw in led bulbs.
Any leakage currents and induced voltages were simply short circuited by the filaments of the old lamps.
Led lights last and that will save you money.
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The bottom line is compatibility.
In this case the led continues to glow permanently when the light switch is turned off.
Even an unfavorable cable routing can be responsible for the glow.