What Does L80/B10 Mean in LED Lighting？

L80/B10 are the lifespan assessment standards for LED light sources and luminaires recommended by the International Society of Illumination (IES).

L80: Indicates a luminous flux maintenance rate of 80%.

This means that after a period of use, the luminaire's luminous flux can still be maintained at more than 80% of its initial brightness. When the brightness decays to below 80%, it means that the lamp's "effective lifespan" has ended.

B10: Indicates a luminaire failure rate of 10%.

This means that within the specified test period, at most only 10% of the products will experience a brightness level below L80, while more than 90% of the lamps can maintain stable and good brightness.

 

L80/B10 means that after the rated lifetime, at least 90% of the luminaires will still maintain 80% of their original light output. This means the system is designed for long-term industrial and commercial applications. Even after 50,000 hours of operation, the vast majority of luminaires will still provide at least 80% of their original brightness, ensuring consistent lighting performance and lower maintenance costs.

For example, Toppo Lighting's lamps can provide 50,000 hours of illumination. After 50,000 hours of use, 90% of the lamps will still maintain a brightness of more than 80% of their initial brightness, and at most only 10% of the lamps will be below this level.

Traditional lighting fixtures often fail suddenly, so a simple "lifespan of 5000 hours" is sufficient. However, LED lighting fixtures dim gradually. Therefore, a more scientific "light decay" metric is needed.

 

Differences between L80 and L70

L80: Maintains 80% brightness, a higher standard, providing more comfortable lighting, suitable for high-quality lighting environments such as shopping malls, offices, and hospitals.

L70: Maintains 70% brightness, relatively lenient, commonly found in general industrial lighting projects.

L80 has higher requirements than L70, meaning the overall quality of the chip, heat dissipation design, and driver power supply is better, resulting in slower brightness decay during use.

 

Differences between B10 and B50

B10: Only 10% product failure rate, high product consistency, and stable quality.

B50: 50% product failure rate, commonly used in some low-end products, with poorer stability.

High-end engineering projects almost always explicitly require L80/B10 parameters in order to reduce later maintenance costs and avoid large-area optical decay.

View more

Assuming 12 hours of lighting per day (a common scenario in commercial settings):

1. Reduced maintenance and replacement costs: Replacement frequency is significantly reduced, making it particularly suitable for high-altitude installations or 24-hour continuous lighting applications.
2. Maintained lighting uniformity: B10 is crucial; 90% of the luminaires maintain consistent performance, preventing work efficiency from being affected by large-area light decay.
3. Better compliance with European large-scale project tender requirements: LEED, WELL, and China Green Building certification projects have specific requirements for L80/B10 parameters.
4. Lower total life cycle cost: L80/B10 luminaires require less maintenance, provide more stable illuminance, and typically have lower long-term operating costs.

Summary

A higher L80/B10 rating means the lighting system maintains its brightness and uniformity for a much longer period. This reduces maintenance costs, minimizes disruptions, and helps ensure that lighting levels continue to meet project requirements throughout the system's lifetime.

 

L80/B10 is currently the most authoritative and reliable standard for evaluating the lifespan of LED lighting fixtures. It not only represents the product's technical strength but also directly affects your future operating costs and experience. Choosing reputable manufacturers and requesting genuine test reports is crucial to ensuring you buy a high-quality light that lasts a long time and provides stable illumination.

learn more

Toppo Lighting Company Limited

Need detailed L80/B10 test reports, product parameter tables, or lighting solutions? Feel free to contact our professional team anytime. We will provide you with one-on-one technical support and customized solutions.

Send Inquiry Now