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CLEARSPACE 5680/1/2 LANTERN
FOR OSRAM TUNGSTEN AND MERCURY LAMPS



Specification
Clearspace 5680/1/2


USE
Side road lighting, 13-15 ft (3.96-4.57 m) mounting height, spacing 100-120 ft (30.48-36.58 m) for best results. Road width up to 30 ft (9.14 m). This lantern is also very suitable for decorative garden, promenade and balustrade lighting, new housing estates, space lighting in front of offices, blocks of flats and halls.


LAMPS
Z5680 for use with 60-200 watt Osram tungsten filament lamp, B.C. cap.
Z5681 for use with 80-125W Osram MB/U or MBF/U colour corrected mercury lamp, three-pin B.C. cap.
Z5682 for use with 60-200 watt Osram tungsten filament lamp, E.S. cap.


MOUNTING
Post top spigot cap for a 3 in. (76.2 mm) diameter x 3 in. (76.2 mm) high spigot. The lantern is secured by four 7/16 in. diameter Allen-type grub screws in the spigot cap.
The lantern can be supplied with a collar insert for the spigot cap to fit a 2.3/8 in. diameter spigot. This must be specified when ordering.


LANTERN BODY
The body consists of an opal "Perspex" dish secured by screws to a cast octagonal spigot cap. The spigot cap carries the lampholder and two pillars supporting a bridge-piece. A light aluminium top spinning screws down on to the bridge piece makign the lantern totally enclosed. An earthing screw is fitted.


OPTICAL SYSTEM
The opal "Perspex" bowl provides a diffusive symmetric light distribution.

WEATHERING FINISH
The spigot cap and top spinning are finished in a handsome high gloss bronze.


Export packing details on application.


The Z5680 lantern with the top spinning removed showing the lamp arrangement.



Light distribution in a vertical plane through maximum intensity.

Light output ratio: 68%
Light in the lower hemisphere: 2700 lumens
Light above horizontal: 19%


Light distribution data are given for the guidance of the lighting engineer and represent the average results of laboratory tests on a number of lanterns taken at random from stock. The data are based on the lamp characteristics stated; if the latest lamp efficiency is different, the candela or lumen values should be calculated in direct proportion to the relative lamp lumens.

The polar curves are based on an average lamp light output through life from a 125w. Osram mercury MBF/U lamp (4875 lumens average).

LANTERN WEIGHT: 8lb (3.6 kg).



The Z5680 post top lantern mounted on a G.E.C. reinforced plastic column