LEAFLET No. 107

No. 617 Vertical Distribution, Right Angle to Long Axis, With 140W Sodium Lamp Full Curve = Lantern with 140W lamp. Dotted curve = DO. with reflectors blacked out.

The BLEECO Sodium Cut-Off Lantern has been designed to give a B.S. Type 3 light distribution, giving a maximum two-way axial beam at 60^o - 70^o and a cut-off at 75^o to 80^o from the downward vertical.

For max. evenness of illumination the cut-off type lantern requires a spacing of not more than 90 to 110ft. per row of lanterns, with a spacing-height ratio of approx. 4:1 and is suitable for central mounting or staggered on wide thoroughfares.

Sodium street lighting undoubtedly gives the highest visibility for current consumption of all types of light sources, and the Cut-Off type of fitting gives a glare free installation with the maximum illumination on the roadway at the minimum expenditure of current.

The BLEECO cut-off lantern is of simple and solid construction, easily accessible and maintained. The hood is made of non-corrosive cast aluminium, to which is fitted a detachable V.E. body. The directional light distribution is effected by two lightly diffused mirror reflectors of a special contour to give the correct light distribution B.S. Type 3 for Cut-Off lanterns.

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