For flexible lighting products, mechanical reliability is just as important as brightness, color consistency, and efficiency. In real-world applications, LED strips are often bent, twisted, routed around corners, or installed in narrow profiles. That is why twisting resistance is a key indicator of product quality.

To verify the structural stability and electrical reliability of our COB LED strips, we conducted a dedicated twisting experiment using professional test equipment. The results show that all tested products maintained normal appearance and lighting performance even after 2000 rounds of twisting.

1. Test Purpose

The purpose of this twisting test was to evaluate whether the COB LED strips can maintain stable performance under repeated torsional stress. Specifically, the test was designed to verify:

1.1 Whether the strip structure remains intact after repeated twisting

1.2 Whether any dead LEDs or flickering appear during the test process

1.3 Whether the product can continue to operate normally after long-term mechanical stress

1.4 Whether the strip is reliable enough for practical installation environments where twisting or bending may occur

This test helps confirm that the product is suitable for applications requiring flexibility, durability, and long-term performance.

2. Tested Products

Three COB LED strip models were tested:

2.1 COB 480LED/M DC24V 3000K

8mm 480Chips/M White COB led strip

2.2 COB 608LED/M DC24V 2700K+6000K

608Chips/M CCT Adjustable COB led strip

2.3 COB 840LED/M DC24V RGB

DC12V/DC24V 840Chips/M RGB COB led strip

These three models represent different lighting types, including single-color warm white, tunable white, and RGB color-changing versions.

3. Test Equipment and Conditions

 

 

The test was carried out using the following equipment:

Power Supply: DC24V power supply

Testing Machine: Twisting machine

Test Conditions

Forward twisting: 4 turns, 1440°

Reverse twisting: 4 turns, 1440°

Total twisting cycles: 2000 rounds

Twisting speed: 150 rpm

Under these conditions, the LED strips were repeatedly twisted forward and backward to simulate mechanical stress that may occur during installation and long-term use.

4. Test Content

The main content of the twisting test included:

4.1 Continuous observation of the strip appearance during the test

4.2 Monitoring for any visible damage, cracking, delamination, or structural deformation

4.3 Lighting checks at different stages of the test

4.4 Recording the number of dead LEDs or flickering LEDs after 500, 1000, 1500, and 2000 rounds

4.5 Calculating the reject ratio at each inspection point

This method ensures a clear and measurable evaluation of product durability.

5. Process Data

During the entire twisting experiment, all three COB LED strip models were inspected at four checkpoints: 500 rounds, 1000 rounds, 1500 rounds, and 2000 rounds.

Twisting Test Results by Product Model and Test Stage

For more detail testing data, pictures, vedio during the test, please feel free to contact Hanron team. We can offer you the complete report of the test.

6. Test Result Analysis

The final judgment of the test was clear: the appearance of the products was not damaged, the lighting test showed no abnormalities, and all three COB LED strips passed the twisting test successfully.

This result demonstrates several important points:

6.1 Excellent Mechanical Flexibility

The strips were able to withstand repeated forward and reverse twisting without structural failure. This indicates strong flexibility and stable internal construction.

6.2 Stable Electrical Performance

No dead LEDs or flickering were observed at any stage of the test. This proves that the circuit design, soldering quality, and material bonding remained stable under torsional stress.

6.3 Reliable for Long-Term Use

A product that can pass 2000 rounds of twisting without failure offers greater confidence for long-term applications, especially in installations involving curves, corners, narrow channels, or repeated handling.

6.4 Consistent Quality Across Different Models

The test included warm white, tunable white, and RGB COB LED strips. All three passed, showing that the product platform is consistently reliable across different configurations.

7. Why Should You Buy COB LED Strips That Have Passed a Twisting Test?

When choosing COB LED strips, many buyers focus only on brightness, color temperature, or price. However, mechanical durability is equally important, especially for projects that require flexibility and long service life.

Here is why buying COB LED strips that have passed a twisting test matters:

7.1 Lower Risk of Installation Failure

During installation, LED strips are often bent, adjusted, or routed into channels. A strip with verified twisting resistance is less likely to fail during fitting.

7.2 Better Reliability in Real Applications

In signage, architectural lighting, display lighting, cabinet lighting, and custom projects, LED strips may experience mechanical stress over time. Tested products provide more dependable performance.

7.3 Reduced Maintenance and Replacement Costs

A durable strip helps avoid flickering issues, dead LEDs, or premature failure, reducing after-sales problems and replacement expenses.

7.4 Higher Project Confidence

For distributors, contractors, designers, and OEM/ODM buyers, a product backed by twisting test data is easier to trust and easier to recommend to customers.

7.5 Stronger Product Quality Assurance

A twisting test is not just a lab exercise. It is evidence that the manufacturer values durability, quality control, and real-world performance.

8. Conclusion

The twisting test shows that all three COB LED strip models performed well under repeated torsional stress. After 2000 rounds, there were no dead LEDs, no flickering, no visible damage, and the reject ratio remained 0%.

These results demonstrate that the COB LED strips offer reliable performance, good flexibility, and stable quality for practical lighting applications.