led flood lights

How To Stop LED Lights from Glowing When Off?

Do you have an LED bulb that is emitting dim light when the lamp’s switch is in the off position? Often, the lamp’s circuit has residual current that makes the bulb glow even when off. If you are wondering how to stop the LED lights from glowing when off, then you are in the right place. We know how annoying and bothersome this can be for you. This post addresses the causes and what to do when your lamps glow when switched off.

What are the main causes of LED lights glowing even when off?

1. LED bulbs vary in quality so a poor quality bulb may glow, flicker or buzz when switched off.

2. You may also find that that there is a problem with electricity circuit and not the bulbs. Some light switches will let through electricity residue even when the switch is off. Why does this happen?

There are 2 reasons why this may occur:

The neutral wire in the circuit may not be bonded to the earth or the earth wire is at a very high resistance creating a small current that lights your bulb.

There may be a small pick-up of electricity from cables that run along each other caused by an electromagnetic induction resulting in the glow.

What you will need to follow this tutorial?

You will need some tools to complete this tutorial with various solutions for the problem.

Extra bulbs

Zener Diode

Neon Indicator

Screw driver

CFL

How To Stop LED Lights from Glowing When Off?

Solution 1: Change bulb

If your bulb is glowing after you have replaced your incandescent bulbs with LED ones, you may try buying a replacement from a reputable brand and replace the glowing ones with that. If it stops glowing then you can replace the others.

Often, the type of bulb you may have installed may be incompatible with the installation in the home leading to the glow or flicker.

Solution 2: Make sure wiring is earthed or Install a Zener diode

An electrician will be in a position to tell you whether the glowing is caused by the wiring not being properly earthed and fix this for you if so. This is very easy to fix. If the glowing due to the cabling being too close, you could ask the electrician to set up a Zener diode which will regulate the voltage of the electricity circuit your glow led is on. This Zener diode will block any residual voltage coming from the circuit. It should not take an electrician long to install the Zener diode. The diode itself costs a couple of dollars so it should be a straightforward and affordable job. 

Solution 3 Use CFL or stick something else to soak the extra voltage

One solution to this conundrum could be trying to stick something in the circuit to soak up this unwanted voltage. Using a CFL or incandescent lamp in one fitting [if a multiple lamp/down light configuration] should mop it up even though this is not the ideal solution. It may work for you as a temporary measure as you try to resolve the problem using other safer and more lasting solutions.

Solution 4: Get a Neon Indicator

Another way to solve the problem is to get a neon indicator. You can search for this from Amazon or any other reliable electronics supplier and you will get good results for a couple of dollars. Get a prewired one with flying leads to save you the trouble of any messes. You should install the indicator between the lone and neutral at the fitting or at the end of a string of downlights so it can soak in all the unwanted current. The neon will then glow instead of the bulb and it can be tucked away from sight. 

Make sure that the neon you select is compatible with the current voltage you have at your home. You can get neon indicators from kitchen appliances such as freezers, fridges and kettles. This is an easy task to accomplish if you are a handy man with the help of a screw-driver. Take advantage of the goods that have already reached their end of life as good indicators will still burn for years losing brightness over time but still functioning.

Solution 5: Try a neutral with lamp or talk to your LED lamp’s manufacturer

You could be using dimmers or smart switches such as illuminated, touch sensitive or WIFI-enabled models that are most are neutral. The clever circuitry in such switches operates by passing a tiny current through the bulb then back to neutral. This current will pass all the time keeping the switch on even when the lights are off. These types of switches will need power all the time because they have touch dials, indicator lights or use a WiFi bridge to connect or need to stay on for any on or off dimming commands.

While this is happening, a small current passes through the filament of the incandescent lamp will not make it glow butt with LED lamps, there may be some reaction causing the glow. If you have smart light switches and find that your LED lights are glowing when switched off, you may need to consult your manufacturer to find a switch that is compatible with the lamps. The other option is to call an electrician to run a dedicated neutral to the switch you have installed in your home (if it can support one) so that it does not go through the lamp.

Solution 6: Work with other lamps

When all is done and nothing seems to work, you may try matching your LED bulb to other lamps. Some dimmable LED lamps to work better than others and sometimes mixing in an odd lamp can have positive effects.

Solution 7: Inspection

As previously stated, problems can arise from unwanted voltage on your wiring due to induction from neighboring circuits. It is not unusual for one to place a tester on a dead circuit and still get a few volts which maybe have been inducted into the circuit or are getting in through poor insulation resistance from adjacent wiring. If your wiring is old or has not been checked lately then you should consider having it inspected to see how your lighting is behaving.

However, the truth is that the issue may be connected to the lamp, the switch or the wiring and frigs such as the neon or resistive load. If you are not comfortable with screw drivers and being around electricity, search for a competent electrician from around who can help in diagnosing and correcting the issue.

In some cases LED lights​ still glow even if they are switched off. This seems to be very funny in the first moment but it also could be very annoying. There are several technical reasons for glowing LED lamps. In this article you will learn the details about glowing lights and you will find the exact steps to identify the issue and how it could be resolved.

Glowing after switching off

CAUSE:

A problem with your electricity circuit instead of your bulbs. Some light switches let through a residue of electricity, even when switched off.

WHY DOES THIS RESIDUAL ELECTRICITY COME THROUGH?

The neutral wire in the circuit is not bonded to the earth or the earth wire is at too high a resistance so is therefore creating a small current which is “powering” your bulb.

There is a tiny pick-up of electricity from cables running alongside each other due to electromagnetic induction. This low level induction from the live wire causes the bulb to glow.

WHY DOES THE RESIDUE OF ELECTRICITY MAKE LEDS GLOW AND NOT OTHER BULBS?

The diodes in your LED bulb can use the very low level of current to create light (other bulbs can’t do this). Glowing LEDs can be particularly noticeable when light bulbs are fitted with two-way switches, i.e. the same bulb is operated by two different light switches.

IS IT A PROBLEM?

It won’t damage your fitting or bulb, but it can be annoying and will cost you in electricity (albeit a very small amount).

LED lights glow when switched off

After switching to LEDs or when replacing a faulty LED lamp in some cases the LED continues to glow weakly after turning the light switch off. Observing this effect the first time could be very surprising 🙂 The light switch is in the off position and the LED lamp continues to glow. In most of these cases the LED just lights up very weakly but also this could be annoying if the luminaire is mounted in your bedroom for example.

There may be the following reasons for this effect:

LED lamp stores energy

in the phosphor layer

in the LED driver

Caused by the electrical installation

Electronic dimmer

Light switch with night light

Switched neutral conductor

Parallel cable routing

LED light stores energy

The first two reasons can be found in the LED light itself. You can easily check this by removing the illuminant from the socket immediately after turning off the light switch. If the bulb continues to glow weakly after removal, it is due to the luminescent layer or the LED driver. However, if the lamp goes out immediately when it is removed from the socket, the cause must be found in the electrical installation.

Glowing of luminescent layer

To produce white light usually blue light emitting diodes are used with an additional luminescent layer (phosphor layer). Depending on the semiconductor material used, the luminescent layer can store a certain amount of energy in the form of visible light for a certain period of time. According to its wattage this leads to the afterglow effect from a few seconds to several minutes.

Afterglow of LED driver

LED bulbs and luminaires are equipped with an electronic circuit called LED driver. This generates the operating current required for the LED (light emitting diode). The driver contains various components including capacitors and inductors. These components can serve as a storage for electrical energy.

Depending on the design of the driver circuit, these components may still be active when the input voltage is switched off by pressing the light switch. As a result the LED continues to light until the energy stores are discharged. This can also take from a few seconds to several minutes.


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