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.
Compiles with B.S. 1877:1964
|
PERFORMANCE
Semi-cut-off sodium suitable for groups A1, A2 and A3 roads up to 10m, mounting heights in accordance
with British Standard Code of Practice CP 1004 Part 2: 1963.
|
|
LIGHT DISTRIBUTION DATA
Candelas - Intensity ratio x 1985 M.H.I. Based on average output of 21,200 Lumens.
Large scale Iso-Candle Diagrams and Polar Curves availabel on request. ELECO
PHOTOMETRIC LABORATORY.
|
Photometric Data
|
GR 150
Semi-cut-off
Sodium
135W SOX
|
B.S.
1788:1964
|
|
Downward light output ratio
|
63.5%
|
|
Angle of elevation
Upper limit of beam
Lower limit of beam
|
76°
59°
|
75° must be within beam
|
|
Peak intensity ratio
|
2.07
|
1.8 - 4.0
|
|
Maximum and minimum intensity ratios in the zone from the
downward vertical to 30° therefrom
|
1.145 max
.55 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
|
.580
|
not to exceed 0.7
|
|
Light output in lower hemisphere (downward flux lumens)
|
12,450
|
See CP 1004 Part 2: 1963 tables
|
Independent Test Report available.
|
