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Spectral Mismatch of Illuminance Meters

Technical Guide 34

Illuminance meters are commonly used in industry to ensure lighting is at an appropriate level to demonstrate compliance for purposes such as health and safety and inspection. They can be purchased relatively cheaply but how good an instrument are they? This technical guide explains one of the most critical components of illuminance meter characteristics, the spectral mismatch, and the likely magnitude of error this effect can lead to in common commercial light meters.

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