Quantity of Light

2-1-025

The product of luminous flux (F) and its duration (dt).

Symbol: Q Q = ? F.dt

Unit: lumen-second (lm.s), lumen-hour (lm.h)

Reference: C.I.E. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

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