footcandles to lumens

From: Richard Jobson (r.jobson@botany.uq.edu.au)
Date: Mon Jan 31 2000 - 20:36:14 PST

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Date: Tue, 1 Feb 2000 15:36:14 +1100
From: "Richard Jobson" <r.jobson@botany.uq.edu.au>
To: cp@opus.hpl.hp.com
Message-Id: <aabcdefg303$foo@default>
Subject: footcandles to lumens

Hi Jose,
This subject was covered in digests 2066 and 2067 but if you don't
have access then basically: a lux = 1 lumen per square meter. A
footcandle = 1 lumen per square foot. Therefore 1 foot candle =
10.7 lux and is a measure of illumination. ie how much light you
see with your eyes.
Richard.

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