47000 comparato a 55600....
be' non e' mica male...
...boh!
···
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of
Caroline Prochazka
Sent: 06 April 2004 14:46
To: [email protected]
Subject: [Radiance-general] Exterior light levels and daylight factors
4. On a perfectly clear morning in a low pollution
area (assumed turbidity=2) my light meter reading read
approx. 55600 lux. A Radiance test (modelling an
unobstructed horizontal plane outdoors) for the same
date and time, and lat. long settings, with
turbidity=2 produced an exterior light level of 47000
lux (15% off the true reading!). While there may have
been some diffuse reflection off nearby buildings,
there was certainly no direct reflection or shadow on
the light meter. This seems to be much too large a
difference. Any suggestions?
__
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