Understanding Maintenance Factors
When designing a lighting system, it is important to consider how the lighting will perform over time. Maintained illuminance (EM) establishes the minimum average level of illumination to be maintained on the reference plane throughout the specified maintenance period, taking into account factors such as light source depreciation, dirt accumulation and other maintenance factors.
A lighting system's performance gradually decreases over time. Applying a light loss factor allows the installation to meet minimum illuminance levels over the life of the installation. Calculating the appropriate light loss factor is therefore recommended so that your project remains compliant over the lifetime of the installation.
