[Radiance-general] RE: More Results

[Zack Rogers]

Hi Rob,

This has been a very interesting thread...many good things to know, and 
once again Radiance shines on.  I was going to comment that your dealing 
with a fraction of a lux difference now, there must be some sensitive 
objects inside your space...is this an art gallery?  And your right, 
with the logarithmic behaviour of the eye the difference becomes even 
more insignificant.

That was my image in ArchRecord a couple months ago!  I'm excited 
someone noticed.  I used the same CAD model to create the CFD image that 
was also in the article.  It was a very interesting project, the first 
project I've worked on where the plants were the most important building 
occupant to provide light for.  With that project and another musuem 
project, I used optics 5 a lot to look at the spectral qualities of 
glass.  Optics 5, with its new Radiance output functionality, is great! 
 One thing we learned, and anyone correct me if I'm mistaken, is that 
the adhesive layer in laminates almost completely eliminates 
ultra-violet from the spectrum.  Ultra-violet, or more accurately the 
Krochmann factor (which is loosely related to UV and also determined by 
optics 5), is the main component of radiation that causes degradation of 
materials (artwork, furniture).  I may be completely off base by now, 
but if you are concerned about obtaining such low light levels to 
minimize the footcandle-hours that fall on artwork or what not, I would 
look at the spectral qualities of the light you are letting in as well 
as they may be more effective at preventing degradation than low light 
levels.

Zack
PS.  Your blog is great!  I had planned on doing something similar 
(although i typically rant and rave about politics) on my website and 
wasn't aware there was a name for something like that.
www.zrogers.fpcc.net - it is not nearly complete (I just had a baby boy 
last month!) but the home page was made entirely with Radiance!

-- 
Zack Rogers
Staff Engineer
Architectural Energy Corporation
2540 Frontier Avenue, Suite 201
Boulder, CO 80301 USA

tel (303)444-4149 ext.235
fax (303)444-4304
http://www.archenergy.com