How to stop my LED Strips from Flickering?

By LED Lighthouse

Learn how to fix flickering or non-illuminated sections of LED strip lights. Discover solutions for loose connections, faulty sections, power supply issues, and voltage drop. Follow preventive measures and invest in high-quality LED products for reliable lighting. Upgrade with LED strip lights from LED Lighthouse.

LED strip lights are a versatile lighting solution, suitable for a variety of applications due to their flexibility, efficiency, and longevity. They add a modern, sleek touch to any decor and have become increasingly popular for ambient, task, or accent lighting.

Despite their benefits, you might occasionally experience issues like your strip light flickering, flashing, or certain sections not lighting up. Flickering lights can be distracting and affect your concentration so if you see flickering LEDs in your office, school or anywhere else, you need to fix this. In this guide, we’ll delve into why these problems occur and offer practical solutions to get your LED lights shining consistently and brightly again.

LED blue light strips

Understanding LED Strip Problems

When your LED lights are flickering or some sections remain dark, it’s often due to issues like dead zones, voltage drop, or inconsistent current flow. Dead zones refer to sections of the LED strip where the lights don’t function.

Voltage drop is a phenomenon where the voltage at the end of the strip is lower than at the start, leading to dimmer lights or even no lights at the far end. Inconsistent current flow, usually resulting from loose connections, can also cause flickering.

Broken LED Strips

Common Causes of LED Strip Flickering or Not Lighting Up:

  • Loose Connections: Loose connections can interrupt the current flow, leading to flickering lights or the creation of dead zones. If your LED strip lights have been installed hastily or roughly handled, connections may become loose.
  • Faulty LED Chips: Faulty or lower-quality LED chips can cause certain sections of your LED strip not to light up. Poor quality control during manufacturing can lead to these issues.
  • Power Supply Issues: If your power supply is underpowered or faulty, it may not provide sufficient power for the entire strip, causing flickering or dead sections. The power supply capacity should match the power demand of the LED strip.
  • Voltage Drop: The concept of voltage drop is especially relevant for longer LED strips. As the power moves along the strip, a decrease in voltage can lead to the end of the strip being dim or not lighting up at all.

Troubleshooting LED Strip Light Issues

To identify the root cause of your problem, you’ll need to do some detective work. Start by checking the connections to ensure they’re tight and secure.

Inspect the LED strip for any visibly faulty or burnt-out chips. Test the power supply with a multimeter to verify it’s delivering the correct voltage. If the strip’s end is dim or not lit, you’re likely dealing with a voltage drop.

For more information on Troubleshooting LED Strip Light Issues

Flickering LEDs

How to stop my LED Strips from Flickering?

Reconnecting Loose Connections

Loose connections are a common culprit when it comes to flickering LED strip lights. This issue arises when the current flow is interrupted, resulting in inconsistent lighting or even dead zones. To address this, first, identify the loose connection. This might be evident where the LED strip light isn’t lighting properly or is flickering.

In the case of solderless connectors, the remedy could be as simple as unplugging the strip from the connector and reinserting it. Ensure the strip is well-seated and secure. For soldered connections, you may need to re-solder the joints. Make sure the solder joint is shiny and smooth, which indicates a good connection.

Remember, proper safety measures, including wearing protective gear and working in a well-ventilated space, are important when soldering.

Replacing Faulty Sections

Faulty LED chips can cause dead zones or sections of your LED strip light not to light up. In such cases, you’ll need to replace the defective section of the strip. Start by identifying the faulty section – this would be the part that doesn’t light up when power is applied.

Once identified, cut out the faulty section with a pair of sharp scissors, ensuring you cut along the designated cut lines to avoid damaging the remaining strip. Next, replace the removed part with a new, functional strip section. Using connectors compatible with your strip type, link the new piece with the rest of the strip. Ensure all connections are secure and the entire strip lights up evenly when powered.

Choosing the Right Power Supply

An underpowered or faulty power supply can lead to flickering LED strip lights or dead sections. The LED Driver must be capable of delivering the required current and voltage for your specific LED strip.

If the power supply is the issue, upgrading to one with a higher capacity might solve the problem. Verify the voltage and current requirements of your LED strip, typically provided in the product specifications, and select a power supply that meets these needs. Notably, using an overrated power supply is better than an underrated one, as the strip will only draw the power it needs.

Check out our LED Driver Calculator 

Preventing Voltage Drop

Voltage drop, especially relevant for longer LED strips, leads to the far end of the strip being dim or not lighting up at all. It occurs due to the resistance of the wire, causing a decrease in voltage as the current moves along the strip.

To mitigate voltage drops, consider a higher voltage LED strip. Higher voltage strips reduce current flow and subsequently, the voltage drop. Another approach involves using a thicker wire, which decreases resistance and improves current flow. Alternatively, injecting power at multiple points along the strip, rather than just at one end, ensures a consistent voltage along its length.

Preventive Measures

To avoid these issues in the future, a few preventive measures can be highly beneficial. Proper installation is the first step – follow the manufacturer’s instructions closely to ensure correct setup. Regular maintenance, such as cleaning the strip and checking for loose connections, helps in the early identification of potential issues.

Lastly, opting for high-quality products makes a significant difference. High-quality LED strips and power supplies, like those available at LED Lighthouse, come with superior build quality and fewer defects, providing better performance, and experiencing fewer issues over their lifespan.


While flickering or non-illuminated sections on your LED strip lights can be frustrating, understanding the common causes and solutions can help you quickly rectify the situation. Remember, high-quality products and correct installation go a long way in preventing these issues, making the investment in good LED lighting worthwhile. Discover the range of premium LED strip lights at LED Lighthouse, designed for seamless installation and optimal performance.

LED Strip Light RGBW 6000 Kelvin White

LED Driver Calculator

By LED Lighthouse

Try our LED Driver calculator to work out the size of the LED power supply required for your LED installation.

More Resources

By LED Lighthouse

Below are a few useful guides to helping you choose the right LED lighting for you project. Please feel free to contact us with any questions.

About LED Lighthouse

Specialist supplier of quality LED lighting

Established in 2011, we are dedicated to supplying quality LED lighting at an affordable price. We offer LED Lights and components from some of the best manufacturers including Integral, Samsung, Epistar, Meanwell and Ltech.
Due to customer demand, in recent years we've grown to specialise in LED Strip Lights and associated parts, developing many of our own products.