Lamp
The choice of the lamp, its type, size and colour depends on several consideration in addition to distribution of light flux on the pavement surface. It is economical to use the largest lamp size in a luminaire which will provide sufficient uniformity of pavement brightness; but this depends on the spacing of the lamp also. The various types of lamps in use for highway lighting are filament, flourescent and sodium or mercury vapour lamps. The cheapest amongst these is the filament lamp. Sodium vapour lamps are preferred at large intersections.
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Highway and Transport Engineering
and this section is about Highway Lighting
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)
picture from www.flickr.com
Highway and Transport Engineering
and this section is about Highway Lighting
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)
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