[Radiance-general] Problems with IES2RAD

[Nick Devlin]

Hey there guys and girls, 
 
I am having trouble with ies2rad I(maybe) . I am using a fitting which
incorporates 2 cfl lamps, each with 1200 lumens output. This is clearly
stated in the .ies file supplied by the manufacturer. Problem is, my
scene looked too dark, and I am not too sure why. 
 
What is the simplest way to reverse-check that the .rad description of
the light includes both lamps?? - ie - is as bright as I would expect???
I am not too clear on all the variables for a light description just
yet.
 
The .rad file reads like this: 


# IES2RAD.EXE
# Dimensions in meters
#<IESNA:LM-63-1995
#<[TEST]      ST5303
#<[MANUFAC]   Zumtobel STAFF
#<[LUMCAT]    60810384
#<[LUMINAIRE] Panos MWW 200 2/18W TC-D VVG
#<[LAMPCAT]
#<[LAMP]      TC-D 18W
# Unknown lamp type (used default)
# 36 watt luminaire, lamp*ballast factor = 1
 
void brightdata St5303_dist
5 cylcorr St5303.dat source.cal src_phi2 src_theta 
0
3 1 0.176 0.0005
 
St5303_dist light St5303_light
0
0
3 1 1 1
 
St5303_light ring St5303.d
0
0
8
            0 0 -0.00025
            0 0 -1
            0 0.088
 
Derived from the following ies file: 
 
IESNA:LM-63-1995
[TEST]      ST5303 
[MANUFAC]   Zumtobel STAFF
[LUMCAT]    60810384
[LUMINAIRE] Panos MWW 200 2/18W TC-D VVG
[LAMPCAT] 
[LAMP]      TC-D 18W
TILT=NONE
2  1200  1.0  19  13  1  2  -0.176  0.000  0.000 
1.0  1.0  36
 
(angles etc omitted for brevity)..
 
Any thoughts would be very gratefully received. 
 
Nick 
 
 

XCO2 


XCO2 conisbee  Ltd
1-5 Offord Street
London N1 1DH
Tel: + 44 (0)20 7700 1000
Fax: + 44 (0)20 7700 4455
Email: nickd at xco2.com
Web: http://www.xco2.com 

engineering sustainability 


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