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title: CI-710s bulb intensity and ON Time
description: CI-710s bulb intensity and ON Time
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# CI-710s bulb intensity and ON Time

The 710s bulb intensity is 16000 Lux on units in the field and is 12000 Lux on units shipped since June of 2022. The light ON time is variable, controlled by the amount of time the spectrometer needs to reach full scale, referred to as integration time. This ON time is usually in the milliseconds (or at least under one second). The bottom lamp measures reflectance and the upper lamp measures transmittance.

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