{"id":13579,"date":"2023-08-14T03:06:09","date_gmt":"2023-08-14T03:06:09","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=13579"},"modified":"2023-12-26T08:38:57","modified_gmt":"2023-12-26T08:38:57","slug":"what-is-lumen-maintenance","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/zh_hk\/%e8%a9%9e%e5%bd%99%e8%a1%a8\/what-is-lumen-maintenance\/","title":{"rendered":"What is Lumen Maintenance"},"content":{"rendered":"

What is Lumen Maintenance<\/h2>\n\n\n

Lumen maintenance is the measurement of how well a lighting product retains its initial lumen output over time. It is a factor in evaluating the performance and longevity of light sources and luminaires. Lumen maintenance is typically expressed as a numerical value followed by the letter L or LM, which stands for lumen maintenance. This value represents the percentage of light output that remains after a certain number of hours of operation. Commonly used values include L50, L70, L80, and L90, or their LM equivalents.<\/p>\n

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For example, if a light source or luminaire is specified as L70 at 50,000 hours, it means that it will maintain 70% of its initial light output after 50,000 hours of use. This measurement provides an indication of how long the light source or luminaire will maintain a certain level of brightness before it starts to significantly degrade.<\/p>\n\n\n\n

Lumen maintenance is an important consideration in lighting design and selection as it helps users understand how the brightness of a light source or luminaire will change over time. It allows for informed decisions about lighting needs and potential replacements. The nomenclature for lumen maintenance is evolving. The current practice of using L or LM values may not be sufficient for comparing products or determining their useful life. A new measure is emerging, which specifies lumen maintenance at a specific number of hours, such as 100,000 hours. This provides a more accurate representation of how well a light source or luminaire will maintain its brightness over a longer period.<\/p>\n

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