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Designed to use a 35 or 55 Watt Sox Lamp

With or without photo electric control unit

SPECIFICATION

Corrosion resistant die-cast aluminium alloy (LM6M) canopy and bowl ring: one piece acrylic bowl with sealed on machined and polished refractor plates and stainless steel spring clips and hinges attached. The canopy is fully gasketted with tropicalised felt against the ingress of dirt and mositure; fitted cable clamps, porcelain terminal block, earth screw and porcelain B.C. lampholder with heat resisting leads.

GR551 has integrated control gear (suitable for both 35 and 55 Watt SOX lamps) mounted on a detachable, galvanized steel gear tray.

C.A.B. vandal resistant bowl also available.

PERFORMANCE

Light distribution to B.S. 1788:1964 type B.1 lanterns.

OUTPUT OF 35 SOX LAMP 4300 LUMENS
OUTPUT OF 55 SOX LAMP 7150 LUMENS

 

Photometric Data GR 550
GR 551
B.S. 1788:1964
Downward light output ratio 64.4% 67.9%
Angle of elevation
    Upper limit of beam
    Lower limit of beam

82½°
51°

76½°
48°
65° must be within beam

Peak intensity ratio
165.5 162 NOT LESS than 110 candelas/1000 lamp lumens
Maximum intensity in the zone from the downward vertical to 30° therefrom 118
123.8
Not to exceed 80% of the peak intensity.
Intensity ratio at the horizontal in the vertical plane parallel to the street axis
94.5

94.6
Not to exceed 100 candelas/1000 lamp lumens