单词	illuminance
释义	illuminance /ɪˈl(j)uːmɪnəns / noun Physics The amount of luminous flux per unit area.Quantitative statistical information is also provided in the form of minimum, average, and maximum work-plane illuminance.... The table overleaf gives average illuminances and minimum measured illuminances for different types of work. The vertical illuminances on the small targets were measured for each session and are shown in Figure II - 7.
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