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The luminaire dirt-depreciation factor is calculated by estimating the reduction in light output due to dirt accumulation on the luminaires over time. This involves assessing the initial luminous output of the luminaire and determining the expected maintenance schedule for cleaning or replacing fixtures. The dirt depreciation factor can be expressed as a percentage, representing the ratio of the maintained luminous output to the initial output, typically derived from empirical data or established maintenance guidelines. Regular monitoring and cleaning can help mitigate this factor and maintain effective illumination levels.

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1mo ago

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