Why Do COB LED Strips Flicker?
COB LED strips are known for their smooth and uniform illumination, but flickering can still occur under certain conditions. Understanding the root causes can help you diagnose issues quickly and keep your lighting system performing at its best.
How to check & avoid:
① Confirm that your dimmer supports PWM or trailing-edge dimming.
② Avoid traditional leading-edge dimmers made for incandescent bulbs.
③ Recommendation: To minimize compatibility issues, it’s best to purchase the LED strip, power supply, and dimmer as a complete kit from the same manufacturer. Manufacturers typically pre-match their components, ensuring stable performance and preventing flickering caused by mismatched parts.
How to check:
① Measure output voltage from the power supply.
② Ensure the supply matches your LED strip’s required voltage (usually 12V or 24V).
How to check:
① Use a high-quality LED driver with sufficient wattage.
② Avoid cheap power supplies that lack proper regulation and protection circuitry.
③ Choose a High-Quality Power Supply：A premium LED power supply reduces voltage fluctuations and provides consistent current, helping ensure long-term reliability.
How to check:
①Touch the strip after running for 10–15 minutes—excessive heat indicates a problem.
② Ensure proper ventilation and heat dissipation.
③ Using an aluminum channel or dedicated heat sink helps dissipate heat effectively, especially for high-power COB strips. This reduces flicker and extends lifespan.
COB LED strip flickering can result from several factors: incompatible dimmers, voltage fluctuations, poor-quality power supplies, and overheating. By using proper dimmer switches, selecting reliable power supplies, installing the strip correctly, and improving heat dissipation, you can ensure stable operation and optimal lighting performance.
