SPECIFICATION
Corrosion resistant die-cast aluminium alloy (LM6M) canopy and bowl ring: one piece
acrylic bowl with sealed on machined and polished refractor plates. Inside of canopy
stoved white, fully gasketted with Noeprene strip to eliminate
dirt and moisture; fitted porcelain terminal block, earth screw and cable clamp.
Porcelain B.C. lampholder with heat resisting leads. Stainless steel hinge pins and
'quick action' spring clips.
The lantern has integral control gear mounted in the canopy.
Compiles with B.S. 1877:1964
|
PERFORMANCE
Semi-cut-off sodium suitable for groups A1, A2 and A3 roads at 8m mounting heights in accordance
with British Standard Code of Practice CP 1004 Part 2: 1963.
|
|
LIGHT DISTRIBUTION DATA
Candelas - Intensity ratio x 1441 M.H.I. Based on average output of 12,250 Lumens.
Large scale Iso-Candle Diagrams and Polar Curves availabel on request. ELECO
PHOTOMETRIC LABORATORY.
Photometric Data
|
GR 102
Semi-cut-off
Sodium
90W SOX
|
B.S. 1788:1964
|
Downward light output ratio
|
84%
|
|
Angle of elevation
Upper limit of beam
Lower limit of beam
|
78°
66°
|
75° must be within beam
|
Peak intensity ratio
|
2.06
|
1.8 - 4.0
|
Maximum and minimum intensity ratios in the zone from the
downward vertical to 30° therefrom
|
1.15 max
.78 min
|
not to exceed 1.7
not less than 0.3
|
Angle of elevation at which the intensity ratio is 1.2 in the
vertical plane parallel to the street axis
|
83°
|
between 80°-86°
|
Intensity ratio at the horizontal in the vertical plane parallel to
the street axis
|
.50
|
not to exceed 0.7
|
Light output in lower hemisphere (downward flux lumens)
|
7,840
|
See CP 1004 Part 2: 1963 tables
|
Independent Test Report available.
|