24V LED strip flickering after installation - driver capacity is sufficient, what could be the cause?

[Casey]

I recently installed 24V LED strips in an indoor linear lighting project and ran into a flickering issue.

Project details:

LED strip type: 24V single-color LED strip

Installation: Recessed aluminum profile

Power supply: 24V constant-voltage driver with ~30% power margin

Dimming method: 0–10V

Issue description:

Slight flickering after power-on

Flickering becomes more noticeable at low dimming levels

Some sections are stable, others flicker

Troubleshooting already attempted:

Replaced the driver

Checked polarity connections

Tested each strip section independently

The issue persists. When driver power seems sufficient, what should be checked first in this type of flickering issue?
Could it be related to dimming compatibility or cable length? Thanks!

[Cassy]

In cases like this, flickering is often not caused by insufficient power alone. Here’s a practical troubleshooting sequence.

Step 1: Verify dimmer–driver compatibility

0–10V dimming can be sensitive at low brightness levels:

• Check if the dimmer output signal is stable

• Confirm the driver officially supports the dimmer model

Unstable dimming signals are a common cause of low-level flicker.

Step 2: Check cable length and voltage drop

Even in 24V systems:

• Long single power runs

• Excessive series connections

Can cause voltage instability at the strip ends.
Use multi-point or segmented power injection where possible.

Step 3: Confirm minimum load requirements

Some constant-voltage drivers:

• Become unstable under very low load or dim levels

• Produce visible flicker

Testing with added load or a higher-quality driver can help identify this issue.

Step 4: Inspect heat dissipation

Poor thermal contact between the strip and aluminum profile can lead to:

• Local overheating

• Current fluctuation

Which may cause flickering.

Summary

When flickering occurs despite sufficient power,
dimming compatibility and power distribution are usually the key factors — not wattage alone.