[Radiance-general] illuminance on external facade

[Christopher Rush]

Illuminance in lux is really lumens/m² and irradiance is Watts/m². Divide the two and the unit of area cancels out.

From: Jill Dalglish [mailto:jill at jilldalglish.com]
Sent: Thursday, March 28, 2013 10:49 AM
To: radiance-general at radiance-online.org
Subject: [Radiance-general] illuminance on external facade

Just to muddy the question a little more, why do the TMY3 files report illuminance in lux but efficacy in lms/Watt?
____________________________________________________________
Electronic mail messages entering and leaving Arup  business
systems are scanned for acceptability of content and viruses
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20130328/9ed91752/attachment.html>