Dear Colleagues,

It gives me much pleasure to participate in this valuable site... Thank you soooo much for all efforts.

kindly tell me your opinion about the available tools for daylighting analysis like Relux, Dialux, Daysim, calculux...etc.

and If the DIVA program is distinct from the others.

Thank you for your valuable comments.

With my best regards.

Views: 3902

Comment by J. Alstan Jakubiec on July 6, 2012 at 2:11pm

Dear Ahmed,

I cannot speak to many of those softwares, but DIVA uses RADIANCE and DAYSIM as its basic daylight simulation engines. RADIANCE/DAYSIM have been validated in many studies, a selection of which is below,

J A Jakubiec and C F Reinhart, "The 'adaptive zone' - A concept for assessing glare throughout daylit spaces", Lighting Research and Technology, 44, pp. 149-170, 2012.

C F Reinhart and J Wienold, "The Daylighting Dashboard - A Simulation-Based Design Analysis for Daylit Spaces", Building and Environment, 46:2, pp. 386-396, 2011.

Reinhart C F, Breton P-F, "Experimental Validation of Autodesk® 3ds Max® Design 2009 and Daysim3.0", Leukos 6:1, 2009.

Reinhart C F, Mardaljevic J, Rogers Z, "Dynamic Daylight Performance Metrics for Sustainable Building Design", Leukos 3:1, 2006.

Reinhart C F, Andersen M, "Development and validation of a Radiance model for a translucent panel", Energy and Buildings 38:7 pp. 890-904, 2006

Reinhart C F , "Lightswitch 2002: A model for manual control of electric lighting and blinds", Solar Energy, 77:1 pp. 15-28, 2004.

Reinhart C F, Walkenhorst O, "Dynamic RADIANCE-based daylight simulations for a full-scale test office with outer venetian blinds." Energy & Buildings, 33:7 pp. 683-697, 2001.


Comment by Ahmed Almrazky on July 6, 2012 at 3:50pm

Dear Alstan,

Thank you soooo much for your valuable response...

I will review this researches as soon as possible, specially they belong to Prof, Reinhart.

I appreciate his valuable researches in lighting analysis... my best regards to him.

by the way the previous softwares based on Radiance too.

another factor should be considered, these softwares are free and easy to be downloaded...without any complex steps for license...etc.

anyway thank you again.

with my best wishes.

Comment by Max D on July 7, 2012 at 4:49pm

I think most of the tools you mentioned in the parent post are not really daylight simulation tools per se, but instead good at electric lighting visualization and planning, which is something DIVA doesn't really do. 3dsMax has some climate-based capabilities to generate point-in-time illuminance values, but lacks climate-based daylight metrics as generated by Daysim. So there's really no getting away from DIVA ^_^

best wishes,


Comment by Ahmed Almrazky on July 13, 2012 at 6:22am

Dear Max,

It will be very useful to review the top 10 daylighting simulation software...

with my best regards.


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