Lumen-Second

lumen-second

[′lü·mən ¦sek·ənd]

(optics)

A unit of quantity of light (luminous energy), equal to the quantity of light radiated or received for a period of 1 second by a flux of 1 lumen. Abbreviated lm-sec.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Lumen-Second

 

a unit of luminous energy in the International System of Units. Abbreviated designations: Russian, Imsek; international, 1m »s. One lumen-second is the luminous energy corresponding to a luminous flux of 11m radiated or received over 1 sec.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.