[Radiance-general] I can't get even similar irradiance values from a lamp.

Lars O. Grobe lars.grobe at nus.edu.sg
Mon Mar 16 01:30:30 PDT 2009


Hi!

>> irradiance level on the surfaces of the box. The cylindrical lamps  
>> has 32mm in diameter and 540mm in length and The radiance of 44W/sr/ 
>> m2 calculated with the UV output of the lamps (7.5W) was applied to  
>> the lamps.

Hm, how did you calculate the 44W/sr/m2 for the lamps? I get
7.5/(2*pi*0.54*0.032)=7.5/0.1086=69W/m2, divided by pi=21.99 W/m2sr.
This means that your light source is two times brighter than I would
expect it to be.

CU Lars.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lars_grobe.vcf
Type: text/x-vcard
Size: 310 bytes
Desc: not available
Url : http://radiance-online.org/pipermail/radiance-general/attachments/20090316/f17a5681/lars_grobe.vcf


More information about the Radiance-general mailing list