Flickering spotlight

Question

Why does one of our spotlights flicker when the switch is off?

Gareth · Accepted Answer

Is it flickering constantly? or randomly flashing? A random flash/flicker could mean the lighting is basically wired the wrong way, meaning the light always has a LIVE supply and the 'neutral' is switching on/off when you turn it on/off. - this will cause random flashing and isnt good for LED's in particular.

Robert · Answer

Is it CFC, LED, or tungsten. Could be the driver or lamp itself. When you say "one of our spot lights", Are you able to swap it with one you know works.

Rod · Answer

Cheap bulbs maybe wrong dimmer if you have a dimmer loose/poor connection

Scott · Answer

Sounds like the lamp has gone or on its way out and needs replacing

Daniel · Answer

It is possible that a small amount of voltage could pass from the permanent live wire to switch live particularly if the wiring is old, and only enough to reach the first point.

Kartheeswari · Answer

When the switch off also Flickering, we need to check neutral line

George · Answer

I have come across this problem a couple of times in the past. I found on both occasions that lack of CPC continuity was the problem. I suspect that the disconnected CPC was having a small amount of voltage induced via its close proximity to line conductors under load and then this in turn is inducing a small amount of voltage in the line conductors in the switched off down lights. I hope this helps, it may not be the answer but if I was called to look at those lights that's where I'd start.

Stephen · Answer

It is possibly a fault with either a capacitor, driver or transformer.

Gary · Answer

If it is an LED type and its on a two way circuit or other wiring close by (above ceiling) the LED picks up induced power from the wiring which is enough to illuminate the LED slightly, it's not dangerous nor does it use any power.
It can be negated using an RC snubbing device on one of the fittings, if there is more than one fitting only one snubber will be required providing they are on the same circuit.

Bhushan · Answer

It can be due to the following reasons:

-residual power 
-capacitive coupling
-worn out switch which does not disconnect the power
-voltage fluctuations and surges
-Induction caused by nearby electrical wires that induce small current when circuit is technically off.

Flickering spotlight

Follow Us

Cookies

Manage Cookies

Essential cookies

Analytics & Tracking

Advertising