Light Exposure

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2-1-070

The product of an illuminance (E) and its duration (dt).

Symbol: H H = ?E.dt

Unit: lux-second (lx.s)


Note 1: Formerly Quantity of Illumination and, in French, Quantite d'Eclairement.


Note 2: Equivalent definition Surface density of the quantity of light received.


Reference: C.I.E. (modified)




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

Illuminance

Energy

second

Contrast

Celsius (previously Centigrade)

Capacitance

charge current

Intensity

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