To compare real-world measures of illumination obtained with the Actiwatch-2 and Clouclip-M2 with ‘gold standard’ photometry measures and to evaluate the ability of Actiwatch-2 to correctly identify photometer-defined conditions: scotopic (≤0.01 lux), mesopic (0.02–3 lux), indoor photopic (>3–1,000 lux) and outdoor photopic (>1,000 lux); and Clouclip to correctly identify photometer-defined conditions within its operating range (>1 lux). Inter-device reliability of Clouclip for illumination and viewing distance measures was also investigated.

中文翻译：

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Actiwatch 和 Clouclip 在真实世界条件下测量照明的可靠性和有效性

将 Actiwatch-2 和 Clouclip-M2 获得的真实照明测量与“黄金标准”光度测量进行比较，并评估 Actiwatch-2 正确识别光度计定义条件的能力：暗视（≤0.01 勒克斯）、中视(0.02–3 lux)、室内明视 (>3–1,000 lux) 和室外明视 (>1,000 lux)；和 Clouclip，可在其工作范围 (>1 lux) 内正确识别光度计定义的条件。还研究了 Clouclip 用于照明和观看距离测量的设备间可靠性。