At a basic level, the Maintenance Factor tells you how much light a system will produce at the start of its lifespan, and how that value will decrease over time
In lighting design and engineering, the maintenance factor refers to the ratio of the illuminance (light level) of a lighting system at a specific point in time, usually after a certain period of operation, to its initial illuminance when the system was new.
It is a crucial consideration when planning lighting installations, as it helps to determine how the light output of the fixtures will change over time due to various factors such as dirt, dust, lamp lumen depreciation, and other environmental conditions.
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