Demystifying G4 LED Bulb Flickering Causes, Solutions, and the Importance of Compatible Transformers

Author:Admin      Publish time: July 31, 2023      Origin: Site


Due to their small size and compact structure, G4 LED bulbs can be used in a wide range of applications, including desk lamps, accent lighting, landscape lighting, chandeliers, pendant lights, and more. They can fit in tight spaces where larger bulbs wouldn't be able to go.

G4 LED bulbs are quite useful, but one of the common issues usually faced by users opting for them is the issue of flickering. Flickering is a serious problem because it causes a lot of disturbance and destruction, impacts the user's comfort, causes eye strain, and is not suitable for health.

It is essential to ensure that these bulbs do not flicker, so opting for compatible transformers for these bulbs could be a great idea. If you are also wondering how a transformer could deal with flickering and what you can do to get rid of it, you are at the right place.

In this guide below, we have featured a lot of details regarding G4 LED bulb flickering, including its causes and potential solutions to deal with this issue. So, let's read below.

Flickering is a common symptom of transformer incompatibility

One of the significant issues that could be faced when your G4 LED bulbs are used without compatible transformers is the issue of flickering. Since the transformer is not suitable according to the electrical requirements of the G4 LED bulb, it could cause voltage and current fluctuations.

Hence, it causes a flicker in the bulb and could cause discomfort for the people in the space. Flickering can be observed in different ways; sometimes, it is a continuous flicker, sometimes flashes.

G4 LED Bulb Flickering: The Root Causes

It is essential to understand the cause of the flickering of the G4 LED bulb; if you know the reason, you will be able to look for a solution. Some of the common causes of this flickering are shared below.

Incompatibility between G4 LED bulbs and traditional transformers.


Load Compatibility: The G4 LED bulbs have different characteristics when compared to traditional halogen bulbs, and you cannot use the same transformers for both. The minimum load of a traditional transformer falls in the range of 20 to 50 watts in case if the wattage of the LED bulb is less than the minimum of transfer, it would flicker.An LED bulb typically has a much lower wattage than a halogen bulb, and it might not meet the minimum load requirement of the transformer, which can lead to flickering or other malfunctions.

Type of Transformer: There are two main types of transformers - magnetic (also known as electromagnetic) and electronic. Magnetic transformers, often found in older installations, might not work well with LED bulbs due to different operational principles. On the other hand, electronic transformers are generally more compatible withG4 LEDs Bulb, but they can still present problems if the minimum load is not met.

Voltage Compatibility: LEDs typically operate on low-voltage direct current (DC), while many traditional transformers output low-voltage alternating current (AC). Using an AC transformer with an LED bulb can cause flickering. In this case, you would need a transformer designed for LEDs that outputs DC voltage.

Power Quality: Transformers vary in their quality, especially in terms of their power supply stability. A low-quality or damaged transformer might supply power unevenly, which could cause LED flickering.

Transformer Aging: Transformers deteriorate with time and usage. An aged transformer might not provide a stable power output, leading to flickering.

The G4 LED bulbs have different characteristics when compared to traditional halogen bulbs, and you cannot use the same transformers for both. The minimum load of a traditional transformer falls in the range of 20 to 50 watts in case if the wattage of the LED bulb is less than the minimum of transfer, it would flicker.

LED bulbs are dimmable, and using a traditional non-dimmable transformer in a dimmable LED bulb would cause the bulb to flicker. Hence, the compatibility of the transformer plays a vital role whether you opt for an off-the-shelf G4 LED or a custom G4 LED bulb.

Voltage fluctuations and their impact on LED bulbs

When there is a fluctuation in the power supply, it could also lead to flickering in the G4 LED bulb. Such changes could occur due to electrical grid issues, like load imbalances and power demands.

Moreover, sometimes when larger appliances are used, like refrigerators, washing machines, and air conditioners, turning them on and off could also cause voltage fluctuation. Faulty wiring and circuits result in an irregular voltage supply to these bulbs, which also leads to flickering.

Main Cause on G4 LED LED Bulb circuits Design

Driver Design: The G4 LED bulb contains an LED driver circuit that is designed to convert AC to DC for the LEDs. If this driver circuit is not well-designed, it may cause flickering. This is particularly true if the driver circuit does not include adequate components for smoothing the converted DC (such as capacitors).

Thermal Management: LEDs are sensitive to temperature. If the heat generated by the bulb is not managed effectively, it could impact the performance of the LEDs and cause flickering. Some LED bulb designs do not incorporate sufficient heat dissipation measures, leading to this issue.

Quality of Components: The quality of the components used in the bulb can greatly impact its performance. Lower quality components may not perform consistently, leading to flickering.

Inrush Current: LED drivers often have a high inrush current, especially when multiple LED bulbs are turned on simultaneously. If the driver circuit is not designed to handle these inrush currents, it can lead to flickering.

EMI Susceptibility: As electronic devices, LEDs can be sensitive to electromagnetic interference. If the bulb's circuit is not properly designed to protect against EMI, it may cause the bulb to flicker.


Potential safety hazards and risks of using non-compatible transformers

There are many risks associated with using transformers that are not compatible with the G4 LED bulbs, and these may include the problem of overheating due to excessive flow of current. It could cause a fire hazard because of being heated more than its ability to handle.


Due to the incompatibility of the transformer, electrical malfunctions could occur, leading to the risk of short circuits. Hence, the transformer plays a vital role in the safety of this bulb, which shouldn't be ignored.

Explore Possible solution to Solve G4 LED bulb flicker issues  in terms of transformer .

Use LED-Compatible Transformers: As mentioned earlier, not all transformers are designed to handle the low power draw of LED lights. Using a transformer specifically designed for LED lights can help to eliminate the issue of flickering.

Meeting Minimum Load Requirements: Some transformers have a minimum load requirement. If you're using a single low-power LED bulb with a transformer designed for multiple higher-power halogen bulbs, you might not meet this minimum load. Adding additional LED bulbs or switching to a transformer with a lower minimum load requirement could help.

Check for Transformer Overloading: If you are using more LED bulbs than the transformer can handle, the transformer may overload and cause the bulbs to flicker. Ensure the total wattage of all connected bulbs is within the transformer's rated capacity.

Transformer with Better EMI Protection: Electromagnetic interference (EMI) can cause LED bulbs to flicker. Using a transformer with good EMI protection can help mitigate this issue.

Choosing a Quality Transformer: Just as the quality of the components in the LED bulb can affect performance, the quality of the transformer can also play a role. A poor quality transformer may not provide a consistent voltage output, leading to flickering.

Replacing Faulty Transformers: If a transformer is old or faulty, it may not output a stable voltage, which could cause flickering. Replacing old or faulty transformers could resolve this problem.

Use Dimmable Transformers If Needed: If the lighting circuit includes a dimmer, make sure you're using a transformer that's designed to work with dimmers. Some transformers might not be compatible with dimmers, leading to flickering when the light level is adjusted.

Explore Possible solution to Solve flicker issues  from G4 LED Bulb Side .

High-Quality LED Bulb: As with all electronics, quality is key. Ensure you are using a high-quality LED bulb, preferably from a reputable manufacturer. High-quality bulbs are built with better components that are less likely to cause flickering.

Bulb with Good Thermal Management: LEDs are very sensitive to heat. Excess heat can cause the bulb to flicker. Choosing a bulb with good thermal management (like a good quality heat sink) can prevent overheating and eliminate flickering.

Choose Bulbs with Proper Driver Design: LED bulbs require a driver to convert the incoming AC to a DC suitable for LEDs. If the driver is not well-designed, it can result in flickering. Look for bulbs with a well-designed driver that includes a high-quality rectifier and sufficient filtering.

EMI-Resistant Bulbs: Some LED bulbs are designed to be resistant to electromagnetic interference (EMI). If EMI is causing your bulb to flicker, consider using an EMI-resistant bulb.

Addressing voltage fluctuations and load imbalances through proper circuit design

Contact G4 LED Bulb manufacturer for Custom services:Manufacturers often have a wealth of knowledge about their products and may be able to suggest specific adjustments to the bulb's circuitry that could resolve the flickering issue when used with your specific transformer. This could involve modifying the LED driver or other aspects of the bulb's design to better match the output characteristics of the transformer.

So, contacting the manufacturer of the G4 LED bulb for advice or possible modifications in relation to your transformer could be a very effective way to solve the problem of flickering. It's always beneficial to tap into the expertise of those who have designed and produced the product, as they have a deep understanding of its operation and potential issues.

Customizing G4 LED bulb circuits to suit specific transformer requirements

If the G4 LED bulb doesn't suit any specific transformer of the customer, the manufacturers must offer them a tailored G4 LED light solution. This will ensure the customizable G4 LED lamps have circuits that suit the transformers.

The custom-designed G4 LED bulbs also may be equipped with dimmable transformers so that the user may enjoy smooth dimming without the risk of flickering.


As you have gone through the detailed guide above, you must now know how important it is to have compatibility between the transformer and G4 LED bulb to ensure it doesn't flicker and last longer.

So, when choosing a G4 LED bulb, always contact Saco Lighting. You will always get the right products with compatible specifications. We have a well-maintained record dealing in these bulbs professionally, and our team of experts always assesses before we hand over an LED bulb to you.

So, feel free to contact us and discuss all your queries, and we even provide a customized lighting solution for G4 LED light bulbs.

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