LED strip flickers after installation, more noticeable at low brightness — what should I check?

[solika]

I’ve installed an LED strip and noticed noticeable flickering, especially when dimming to lower brightness levels. Here’s the current setup:

• 24V LED strip
• 24V constant voltage power supply
• PWM dimmer for brightness control
• Stable at full brightness
• Flickering mainly at low brightness

Installation details:

• Strip length: approx. 6 meters
• Single-side power input
• No additional controller
• Dimmer rated higher than the actual load

Questions for those with hands-on troubleshooting experience:

1. Is this more likely caused by dimmer incompatibility or power supply behavior?
2. Could single-side power input contribute to the flickering?
3. Is there a recommended troubleshooting order to isolate the issue efficiently?

Looking for practical troubleshooting insights rather than general advice. Thanks!

[Ixora]

This type of behavior — stable at full brightness but flickering at low levels — is quite common in real installations and is usually related to dimming behavior and load matching.

Dimmer compatibility:
Many PWM dimmers become unstable at low frequencies or light loads, which often causes flickering at lower brightness levels.

Power input considerations:
With longer strips, single-side power input can lead to voltage variation along the strip. While it may not be the root cause, it can amplify flickering effects.

Troubleshooting approach:
A practical first step is to bypass the dimmer and test the strip at full brightness. If the flickering disappears, the issue is very likely related to the dimmer or its PWM characteristics. From there, testing a higher-frequency or better-matched dimmer usually resolves the problem.

From experience:
In similar setups, switching to a higher-quality PWM dimmer has solved this issue in most cases.