C
HAPTER
1. I
NTRODUCTION
1-11
02.9628.0010 CONFIDENTIAL
7-Oct-97
1.3 Photometric Data
The chart below represents beam specifications for the
VL4
luminaire.
Specifications are given for spot diffusion and flood diffusion.
VL4
Wash Luminaire with 400W Metal Hallide Lamp
LENS and
LAMP
SETTINGS
DIFFUSION CANDELA
(cd)
BEAM
ANGLE
(degrees)
BEAM
DIAMETER
TN*
FIELD
ANGLE
(degrees)
FIELD
DIAMETER
TN*
HTI 400 W/SE
(Narrow Beam)
Spot
Flood
876,000
126,400
4
11
.07
.19
11
24
.19
.42
HTI 400 W/SE
(Wide Beam)
Spot
Flood
235,200
81,200
9
14
.16
.24
20
29
.35
.52
HTI 404 W/SE
(Narrow Beam)
Spot
Flood
1,012,000
146,400
4
11
.07
.19
10
24
.17
.42
HTI 404 W/SE
(Wide Beam)
Spot
Flood
576,000
107,200
5
13
.09
.23
15
28
.26
.5
* Multiply distance by Tn to determine coverage.
To calculate Illuminance (I) at a specific distance (D); I = cd (cos 0)
D
2
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