For maximum evenness of illumination a spacing of not more than 90-110 ft. at a mounting height of 25 ft. should be arranged i.e. a spacing height ratio of approxmately 3.5.

The "Cut-Off" type give a glare-free installation with the maximum visibility and illumination on the roadway.

This type is very suitable for the lighting of island sites, for central suspension and is extremely effective for opposite mounting on wide thoroughfares.

The are also suitable for installation on roadways in close proximity to aerodromes as no light is given above the horizontal.

The lantern consists of a one-piece alum-alloy cast Hood, which can be supplied for either Top or Side entry.

The inside of the hood is fitted with two lightly diffused mirror reflectors of a special contour to give the required light distribution.

The enclosed type is fitted with a shallow Perpsex bowl which is hinged and sealed to the main body casting.

The lantern is simple and of robust construction and is easily maintained.

Standard Finish: Exterior, Hammered Metallic Beige; interior, white.

Polar Distribution Curves Of P118/9 With 140W Sodium Lamp
Based On The Lamp Output Of 10640 Lumens

Iso-Candle Of P118/9 With 140W Sodium Lamp

P131

This lantern is particularly suitable, both for lantern output and distribution for mounting at a height of 30 to 35 feet, at a spacing height ratio of from 3 to 3.5, to give an equivalent value of illumination for the Group A.2. This type is very suitable for the ligthing at Roundabouts, for Central Suspension and for opposite mounting on wide thoroughfares.

They are also suitable for installation on roadways in close proximity to aerodromes as no light is given above the horizontal.

The lantern consists of one-piece aluminum-alloy cast hood of elegant shape, fitted with a shallow clear Perspex bowl, which is hinged at teh side, arranged with quick released clips and sealed with a gasket to make the interior dust tight.

The interior is fitted with two lightly diffused mirror reflectors of a special contour to give a maxiumum 2-way intensity at 65° from the downward vertical.

Where used with a 200W Linear lamp, tow cast brackets with Bi-pin holders are fitted at the requisite position for the lamp focus. With the 200W SOI/H lamp a B.C. holder is fitted with a suitable spring suspension.

The interior is also fitted with a terminal block wired with asbestos covered flexible cable, with also an earthing screw.

Standard finish - Exterior Hammered Metallic Beige, Interior white enamelled.

Polar Distribution Curves Of P130/1 With 200W Linear Sodium Lamp
Based On The Average Lamp Output Of 18400 Lumens

Iso-Candle Of P130/1 With 200W Linear Sodium Lamp