Dear Radiance users!
How do one make a model of a desk top lamp using Radiance. I know the type of flourescent tube I want to use (lenght, diameter, Ra-value and lumen) , but I don't know the shape of the reflector yet. I want to optimize the reflector shape and the way it is mounted in relation to the flourescent tube and optionally generate an ISO-lux diagram for the work plane and also to generate an ISO-lux table for import in Excel.
I have browsed Radiance-Online for "luminaire" and "lamp" just to find out that modelling luminaires/lamps always start with using an IESNA candlepower file which I don't have. So where do I start?
Best regards,
Steen Traberg-Borup
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Steen Traberg-Borup Phone: +45 45865533
Danish Building Research Institute Direct phone: +45 45742380
Department of Health and Comfort Fax: +45 45867535
Dr. Neergaardsvej 15 E-mail: [email protected]
DK 2970 Horsholm URL: http://www.sbi.dk
Denmark
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Steen,
I've found that the easiest way to deal with situations like this is to use some sort of forward ray-tracing program such as TracePro to model the luminaire you want with the materials that you want. Some of them get quite in-depth with their materials libraries, so specifying exactly what you want is generally not a problem. You should also be able to define the source you want and set the lamp lumens appropriately. After running the simulation, you can then output the distribution to an IES file for use in Radiance. I'm sure there are ways to do this strictly in radiance as well, but I'm not as familiar with the methods you might use. If anyone else has experience using only radiance for this sort of thing I would also be interested to hear how you did it as well.
Dave
Steen Traberg-Borup wrote:
···
Dear Radiance users!
How do one make a model of a desk top lamp using Radiance. I know the type of flourescent tube I want to use (lenght, diameter, Ra-value and lumen) , but I don't know the shape of the reflector yet. I want to optimize the reflector shape and the way it is mounted in relation to the flourescent tube and optionally generate an ISO-lux diagram for the work plane and also to generate an ISO-lux table for import in Excel.
I have browsed Radiance-Online for "luminaire" and "lamp" just to find out that modelling luminaires/lamps always start with using an IESNA candlepower file which I don't have. So where do I start?
Best regards,
Steen Traberg-Borup
******************************************************************
Steen Traberg-Borup Phone: +45 45865533
Danish Building Research Institute Direct phone: +45 45742380
Department of Health and Comfort Fax: +45 45867535
Dr. Neergaardsvej 15 E-mail: [email protected]
DK 2970 Horsholm URL: http://www.sbi.dk
Denmark
******************************************************************
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