{"id":1373,"date":"2026-03-03T19:55:19","date_gmt":"2026-03-03T11:55:19","guid":{"rendered":"https:\/\/glowinled.com\/?p=1373"},"modified":"2026-03-02T20:11:05","modified_gmt":"2026-03-02T12:11:05","slug":"how-to-verify-cob-led-strip-luminous-efficacy","status":"publish","type":"post","link":"https:\/\/glowinled.com\/ru\/how-to-verify-cob-led-strip-luminous-efficacy\/","title":{"rendered":"\u041a\u0430\u043a \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c \u0441\u0432\u0435\u0442\u043e\u0432\u0443\u044e \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c COB LED \u043b\u0435\u043d\u0442\u044b"},"content":{"rendered":"

\n \"Testing\n<\/p>\n

When we test new batches of COB strips in integrating spheres<\/a> 1<\/a><\/sup>, we often find a significant gap between the theoretical brightness of the LED chip and the actual output of the finished strip. Many buyers focus purely on the price per meter, ignoring the hidden costs of inefficient lighting LED Source Efficacy<\/a> 2<\/a><\/sup>. If you are sourcing for large commercial projects, vague data sheets can lead to massive energy waste and disappointed clients.<\/p>\n

To accurately determine luminous efficacy, you must ask suppliers for the system efficacy of the fully assembled strip at its operating temperature, not the theoretical efficacy of the bare LED chip. Always calculate this by dividing the total measured lumen output by the total wattage consumed per meter.<\/strong><\/p>\n

Here is how you can dig deeper into the data and get honest answers from your lighting partners.<\/p>\n

How can I verify the actual luminous efficacy of my COB LED strips before I place a bulk order?<\/h2>\n

Whenever we send samples to our clients in Germany or Australia, we encourage them to look beyond the printed label LM-79-08 or LM-79-19 test report<\/a> 3<\/a><\/sup>. In our production facility, we know that the phosphor coating on COB strips\u2014the very thing that makes them \"dotless\"\u2014also acts as a filter that reduces light output compared to traditional SMD LEDs.<\/p>\n

You can verify efficacy by requesting a working sample and measuring the current draw and illuminance using a bench power supply and a lux meter. Divide the measured lumens by the calculated wattage (Voltage \u00d7 Current) to get the real-world lm\/W figure, which often differs from marketing claims.<\/strong><\/p>\n

\"Engineer<\/p>\n

The Difference Between Chip and System Efficacy<\/h3>\n

The most common trick in the industry is quoting the LED Source Efficacy<\/strong>. This is the efficiency of the bare diode inside a lab environment, often tested instantly (pulse test) before heat builds up under-driving technique<\/a> 4<\/a><\/sup>. However, COB strips are unique. They are covered by a continuous layer of silicone mixed with phosphor.<\/p>\n

When we manufacture these strips, we apply this coating to create uniform light. However, this layer absorbs some light, and the Flexible PCB (FPCB) has resistance that consumes power. Therefore, you need the System Efficacy<\/strong>.<\/p>\n

Practical Verification Steps<\/h3>\n

If you do not have an integrating sphere, you can still perform a \"sanity check\" verification:<\/p>\n

    \n
  1. Power Draw Test:<\/strong> Connect 1 meter of the strip to a DC power supply. Set the voltage (e.g., 24V) and read the current (Amps).\n