Quantity of Light

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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)

force

Farad

Fahrenheit

second

hour

Contrast

Celsius (previously Centigrade)

Capacitance

charge current

Intensity

Illuminance

Energy

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM