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Joel McKellar, Assoc. AIA, LEED AP
Senior Member
Username: joelmckellar

Post Number: 16
Registered: 02-2006
Posted on Tuesday, February 12, 2008 - 03:29 pm:   Edit PostDelete PostPrint Post

This isn't really a spec issue, but I'm hoping some of you may be able to help...

Does anyone have any experience with daylight modelling programs? I looked into Radiance and Desktop Radiance, but it seems to work only with AutoCAD R14 and 2000, and I seriously doubt we have any copies left of either...

We're not looking to do anything particularly crazy, but are interested in looking at the effect light shelves would have on designs we're working on. We also would need to see lighting levels on various surfaces (teacher and student desks, kitchen tables, etc.)

I've heard there are some plugins for VIZ renderer?

Obviously cheap/free programs would be preferred, but I'll pay for something that will save us time.

Any advice/stories would be greatly appreciated. Thanks!
Steve Michel (Unregistered Guest)
Unregistered guest
Posted on Tuesday, June 03, 2008 - 08:39 pm:   Edit PostDelete PostPrint Post

You can use Sketchup with the Radiance plugin
Joyce J Kelly
New member
Username: jjkelly

Post Number: 1
Registered: 09-2008
Posted on Tuesday, September 30, 2008 - 12:40 am:   Edit PostDelete PostPrint Post

Controlled daylighting is probably the most productive green technique, not just in schools, but in any construction. AGi32, by Lighting Analysts out of Littleton, CO is the most accurate daylight & elec. light modelling program available. It imports dwg & dxf files in 2d or 3d. It can analyze every detail of your model including vtc of glass and reflectances of every contributing exterior & interior surface - including light shelves. Ideally, you want someone in your firm to specialize in this program for every project. It will help you site buildings better and zone your electric lighting so you can turn off the redundant light. Weekly practice to keep skills up is essential. Email me if you need any additional assistance.
Joyce Kelly, LC, LEED AP, Assoc. AIA
Michael J. Holtz
New member
Username: mholtzlightlouvercom

Post Number: 1
Registered: 06-2010
Posted on Sunday, June 27, 2010 - 07:45 pm:   Edit PostDelete PostPrint Post


Maybe too late but I would encourage you to look into optical daylighting products, such as the LightLouver Daylighting System ( www. lightlouver.com ). After researching, designing and testing numerous side-daylighting strategies for 35 + years, I am convinced that light shelves don't work because they do not effectively and uniformly distribute daylighting deep into the daylit space, and they do a poor job of controlling glare and direct sunlight penetration onto work surfaces.

I have to come clean and say that I along few a few of my colleagues invented the optical design of the LightLouver Daylighting System. However, I think it will be worth your while to take a look at this concept for office spaces, classrooms, research laboratories, and other commercial ( non-residential ) buildings. Contact me if I can be of more assistance.

While I am very familiar with AGI32, I prefer Radiance, as it is a more accurate and versatile lighting simulation. If you need daylighting design and modeling help in general, please give me a call, as this is one of the services that LightLouver LLC is offering ( for a fee of course. ).

GOod luck... and let me know what you end ( ended ) up doing.
Steve Khouw LEED AP
Senior Member
Username: karsidi

Post Number: 10
Registered: 04-2008

Posted on Wednesday, August 04, 2010 - 12:23 am:   Edit PostDelete PostPrint Post

Michael, is there a distributor for Asia, specificaly in China? What would be the indicative cost?

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