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ENERGY SAVING AND ENVIRONMENTAL COMPATIBILITY IN ROAD LIGHTING
Full text linkThis research was carried out with the cooperation and the financial support of ENEA, the Italian Agency for Energy of the Ministry for the Economic Development.
The paper analyses the conditions for assuring the compatibility of external lighting with the environment and particularly with consumption of energy on one side and the interference with astronomical observations on the other.
The effects of different types of luminaires are described relative to the road illuminated according to illuminance and luminance criteria.
The paper demonstrates that illuminated towns seen from far distances, i.e. the main source of disturbance for astronomic observations, behave like single diffusing sources, since the luminaires are hidden in urban "cavities" bordered by buildings.
A model is presented for the analysis of territory around a site, aimed at identifying the possibilities to improve the environmental compatibility of outdoor lighting installations and the possibility of local modification to improve the situation
The luminance coefficient in road lighting. A parameter to save energy and reducing atmospheric pollution
No full textThe papers presents some consideration about the impact of the use of several typologies of luminaries, including the LED equipped, on energy saving and atmospheric pollution. In road lighting it is easy to connect energy consumption, related to illuminance on the road, with the perceptive result (and standard constraint), related to the luminance. This connection is made by the luminance coefficient. The paper shows the possibility offered by the adoption of the luminance coefficient as an essential parameter for the design of efficient road lighting installations and the associated reduction of the atmospheric pollution and of the sky luminance
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