LM80 Explained

LM-80 is a test procedure that is used to measure the lumen maintenance of LED packages, arrays, and modules. In simple terms, it is a way of measuring how well an LED product will maintain its brightness over time.

The LM-80 test involves subjecting the LED product to a specific set of operating conditions, such as temperature and current levels, and measuring its light output over a period of time. The test is typically conducted over a period of 6,000 hours, although shorter or longer test durations may be used depending on the application.

During the test, the LED product is powered continuously, and its light output is measured at regular intervals to determine how much it has degraded over time. The results of the test are used to calculate the expected lifespan of the LED product and to predict how much its light output will decrease over time.

The LM-80 test is an important tool for manufacturers and specifiers of LED products because it provides a standardized method for comparing the performance of different products. By using the same test procedure, manufacturers can provide accurate and consistent data on the expected lifespan and lumen maintenance of their products. This allows specifiers to make informed decisions about which products are best suited for their specific applications.

In summary, the LM-80 test is a way of measuring how well an LED product will maintain its brightness over time. It involves subjecting the product to a specific set of operating conditions and measuring its light output over a period of time to determine how much it has degraded. The results of the test are used to calculate the expected lifespan and lumen maintenance of the product, and to help specifiers make informed decisions about which products are best suited for their specific applications.

Application Examples:

L70 Lifetime

L70 is a commonly used term in the lighting industry to describe the lifespan of an LED lighting product. Specifically, L70 represents the point at which the light output from an LED product has degraded to 70% of its initial output.

LED lighting products are known for their long lifespan, but their light output can gradually degrade over time due to factors such as temperature, humidity, and current levels. L70 is a measure of how long it takes for the light output from an LED product to decrease to 70% of its initial output.

For example, if an LED product has an initial light output of 1000 lumens, its L70 lifetime would be the point at which its light output has degraded to 700 lumens (70% of its initial output). This is typically measured in hours of operation, and is based on the expected time until the product's light output has degraded to the L70 level.

L70 is an important consideration when selecting LED lighting products because it can impact the product's suitability for a specific application. Products with a longer L70 lifetime will maintain their brightness for a longer period of time, which can be important in applications where consistent light output is critical. On the other hand, products with a shorter L70 lifetime may be more suitable for applications where the product will be replaced more frequently, or where a lower initial cost is a higher priority.

In summary, L70 represents the point at which the light output from an LED product has degraded to 70% of its initial output. It is an important consideration when selecting LED lighting products because it can impact the product's suitability for a specific application.

L90 Lifetime

L90 is another commonly used term in the lighting industry to describe the lifespan of an LED lighting product. Specifically, L90 represents the point at which the light output from an LED product has degraded to 90% of its initial output.

Similar to L70, L90 is a measure of how long it takes for the light output from an LED product to decrease to a certain level. However, L90 represents a higher level of light output degradation than L70. This means that products with a longer L90 lifetime will maintain their brightness for an even longer period of time than products with a longer L70 lifetime.

For example, if an LED product has an initial light output of 1000 lumens, its L90 lifetime would be the point at which its light output has degraded to 900 lumens (90% of its initial output). This is typically measured in hours of operation, and is based on the expected time until the product's light output has degraded to the L90 level.

L90 is an important consideration when selecting LED lighting products for applications where maintaining a high level of light output is critical. For example, in applications such as emergency lighting, security lighting, or sports lighting, it may be important to maintain a high level of light output for an extended period of time. Products with a longer L90 lifetime can help ensure that the required level of brightness is maintained for the duration of the product's lifespan.

In summary, L90 represents the point at which the light output from an LED product has degraded to 90% of its initial output. It is an important consideration when selecting LED lighting products for applications where maintaining a high level of light output is critical.