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Member
vil_lo
Posts: 3
Registered: ‎01-11-2012
Message 1 of 5 (464 Views)

Radiance - Illuminance values are overestimated?

464 Views, 4 Replies
01-11-2012 05:55 AM

Hello there,

 

I am currently rendering a rather complex building with artificial lighting installed only. I imported my model from Ecotect to Radiance and then I got the lux levels calculated and then I imported that back to the Ecotect's grid.  However, the lux values that I got from Radiance/Ecotect are approximately ten times higher than what I measured from the actual building. I repeated the calculations for a number of times and I tried to switch on/off some lights as well. Yet, the lux calculation is still ten times higher than the actual measured values. Can anyone advise what's wrong? My model is built in millimeters. I am not sure if that would cause any problems?

 

Thanks.

 

v

Active Member
adam.barker
Posts: 7
Registered: ‎11-23-2011
Message 2 of 5 (428 Views)

Re: Radiance - Illuminance values are overestimated?

01-27-2012 02:11 PM in reply to: vil_lo

V,

 

did you consider the sky condition? It would be best if you had the exact time and date the light levels were taken, as well as the relative cloudiness of the sky.

Valued Contributor
arqyt
Posts: 94
Registered: ‎08-31-2010
Message 3 of 5 (418 Views)

Re: Radiance - Illuminance values are overestimated?

01-30-2012 08:42 PM in reply to: vil_lo

I always verify the normal faces that often leads to problems of analysis
Are you set appropriate values ​​of reflection?

Jose M Carralero.
ArqyT
Member
vil_lo
Posts: 3
Registered: ‎01-11-2012
Message 4 of 5 (414 Views)

Re: Radiance - Illuminance values are overestimated?

01-31-2012 12:04 AM in reply to: arqyt

Hi Jose,

 

Yes, indeed. I measured the reflection values on-site... 

 

v

Member
vil_lo
Posts: 3
Registered: ‎01-11-2012
Message 5 of 5 (413 Views)

Re: Radiance - Illuminance values are overestimated?

01-31-2012 12:06 AM in reply to: adam.barker

Dear adam.baker,

 

Yes. My sky condition is correct and I set the exact time, date and location when I did my simulation...

 

v

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