LED lights have become increasingly popular for their energy efficiency and longevity, but encountering flickering issues can cause frustration and confusion. Understanding the common causes of LED light flickering is crucial to maintain a smooth and consistent lighting setup. In this article, we will explore these causes and provide practical troubleshooting solutions to help you fully enjoy the benefits of your LED lighting without any flickering distractions.

Identifying the Culprits: The two primary culprits behind these issues are incompatible power supplies and dimmers. Understanding how these elements interact is crucial to maintaining steady, flicker-free LED lighting.


Voltage instabilities and fluctuations are among the primary culprits behind flickering LED lights. When an ill-suited power supply is combined with an incompatible dimmer, the result is an erratic cycling of voltage, leading to the bothersome flicker effect. A high-quality and stable power supply is crucial to ensure optimal performance and prevent flickering in LED lights. Outdated power supplies or those not specifically designed for modern LED lighting systems can lead to these issues and should be avoided.


To prevent flickering complications, consider upgrading to Electronic Low Voltage (ELV) power supplies or Magnetic Low Voltage (MLV) power supplies. These alternatives are designed specifically to work seamlessly with modern LED technology, ensuring a smooth and consistent power stream. When selecting a power supply, it is crucial to ensure compatibility with your lighting fixtures. Some LED fixtures work well with MLV power supplies, while others may be incompatible and at risk of damage. Using the appropriate power supply that aligns with your lighting type is essential for avoiding flickering issues, protecting your fixtures and power supplies, and creating an uninterrupted and high-quality lighting experience.

View Power + Controls How to Choose a Power Supply


One of the noteworthy hurdles encountered in LED lighting setups arises when power supplies do not adequately cater to the wattage demands of the connected LEDs. This predicament can lead to frustrating flickering sequences and an overall erratic illumination performance, diminishing the advantages offered by energy-efficient and enduring LED technology.


To address LED flickering issues that may arise from undersized power supplies, it is crucial to carefully align the power supply's capacity with the cumulative wattage requirements of the entire LED lighting configuration. Calculating the combined wattage produced by the LEDs and selecting a power supply that exceeds this total can be a measure to counteract flickering problems. However, it is important to note that simply choosing a larger power supply may not solely resolve the issue. Seeking guidance from our team of LED experts for power supply recommendations can provide valuable insights for achieving a flicker-free experience. By proceeding cautiously with these steps, you can aim to establish a consistent and uninterrupted power distribution, thereby optimizing the benefits of your LED lighting setup and potentially reducing the nuisance of flickering.


Dimmers are essential for adjusting LED brightness, but not all dimmers are suitable. Older dimmers made for incandescent bulbs can cause issues with modern LEDs like flickering and damage. When choosing a dimmer, consider using trailing-edge dimmers. Unlike leading-edge dimmers designed for incandescent, trailing-edge dimmers work better with LEDs. They cut off the AC waveform's trailing edge, providing smoother dimming and reducing flickering risks. Additionally, select the right power supply for your LEDs. Avoid Magnetic Low Voltage (MLV) dimmers for LED puck lights, as they cause flickering and potential damage. Strip lights can work with MLV dimmers if power requirements match, but LED-specific dimmers are still recommended for optimal performance.

In short, choose trailing-edge dimmers for LEDs and match the right power supply to your lighting setup to ensure a flicker-free, well-lit environment.


When setting up your lighting system with LED components, it's crucial to ensure that your dimmer and power supply are fully compatible. Mismatched dimmer and power supply combinations can lead to undesirable outcomes and compromised performance. To avoid any issues, take note of the following key points:

  • Dimmer Type Compatibility: Different dimmers are designed for distinct lighting technologies. For instance, MLV (Leading Edge) dimmers and ELV (Trailing Edge) dimmers are tailored to specific types of lighting setups. It's imperative to select a dimmer that matches your LED lighting system's requirements. Attempting to use an MLV power supply with an ELV dimmer or vice versa can result in suboptimal performance and potential flickering issues.
  • Forward Phase vs. Reverse Phase: An important factor related to dimmer compatibility is the distinction between forward phase and reverse phase dimmers. LED lighting systems operate using either of these methods. Forward phase dimmers (leading-edge) cut the beginning of each AC waveform, while reverse phase dimmers (trailing-edge) cut the end of the waveform. Matching the dimmer type to the LED technology is essential to avoid compatibility problems.
  • Minimum Wattage Load Requirement: Check if your chosen dimmer has a minimum wattage load requirement. This specification refers to the lowest power draw that the dimmer needs to function optimally. It's essential to select a dimmer that aligns with your LED lights' wattage specifications. Opting for a dimmer with a minimum wattage load that suits your LEDs will ensure smooth and flicker-free dimming performance.

In summary, when configuring your LED lighting system, always pay close attention to dimmer and power supply compatibility. Selecting the appropriate dimmer type, considering the forward vs. reverse phase requirements, and meeting the minimum wattage load specifications are critical steps toward achieving consistent and high-quality dimming performance.

Check out our dimmer options on our website Need more info? See our dimmer playlist


Flickering LED lights can be a frustrating issue, but by understanding the common causes and implementing the mentioned troubleshooting steps, you can fully enjoy the beauty and benefits of LED lighting without any flickering distractions.

Our expert team is dedicated to ensuring your LED experience is flicker-free. From power supplies to dimmers, we have the solutions to make your LED lighting journey enjoyable. Thank you for choosing aspectLED as your lighting partner.