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<p class=MsoNormal><a name="OLE_LINK2"></a><a name="OLE_LINK1"></a><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Dear
Trnsys-users,</span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m looking for a method to define the illuminance
(lux) in a zone. The purpose is to know when people put on the lights in a
space.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=NL-BE style='font-size:
10.0pt;font-family:Arial'>I thought to use an output of type 89b: TMY2 Data
Reader.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=NL-BE style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>But I don’t find some explination about some outputs.
So I don’t know for sure what the difference is between the output
‘direct normal illuminance’ and ‘global horizontal
illuminance’. Or does anyone suggest to use another output or
method ?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Further when I plot these outputs the results seem to be
extremely low : the maximum value over one year is 935illuminance for the
direct normal illuminance and 970illuminance for the global horizontal
illuminance. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>To end a question to be sure : the unity illuminance is
equal to lux ?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks in advance,<o:p></o:p></span></font></p>
<p style='margin-bottom:12.0pt'><font size=2 face=Verdana><span lang=EN-GB
style='font-size:10.0pt;font-family:Verdana'> <st1:PersonName w:st="on">Joke
De Beuckelaer</st1:PersonName> </span></font><span
lang=EN-US><br>
</span><font size=2 face=Verdana><span lang=EN-GB style='font-size:10.0pt;
font-family:Verdana'> project engineer </span></font><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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