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Fontaine Maréchal Lyautey
Fontaine Maréchal Lyautey : 5400 kW/h d’économie annuelle, soit une facture divisée par 43. Photo : Xavier ChabertPhoto : Xavier Chabert

La ville de Lyon équipe quatre fontaines de LED immergeables et réduit sa facture énergétique

La LED a récemment gagné suffisamment de puissance pour se révéler être une solution performante dans l’éclairage immergé. Cette technologie se montre économe grâce à son bon rendement, sa puissance modulable et un choix d’optiques permettant de focaliser l’effet lumineux à l’endroit souhaité. La ville de Lyon s’est tournée vers cette technologie pour renouveler les projecteurs de quatre de ses fontaines. Elle a choisi la société LEC, spécialiste de l’éclairage à LED, qui a développé une gamme de luminaires immergeables puissants. Frédéric Durand, chargé d’opérations à la direction de l’éclairage public de la ville, explique ce choix : Nous avons fait de nombreux tests pour comparer plusieurs technologies et options techniques. Nous avons choisi la LED pour sa compacité qui la rend facile à dissimuler. La durée de vie du luminaire a également été décisive, l’entretien étant particulièrement contraignant sur les fontaines. D’autre part, les faisceaux intensifs et très précis de la LED s’avèrent particulièrement adaptés pour une bonne mise en valeur des jets d’eau. Lyon est déjà forte d’une longue expérience dans la mise en place des éclairages innovants et économiques. En 1989, la Ville a lancé le premier plan lumière européen, visant à travailler la mise en valeur des bâtiments et du patrimoine de la cité. En 2003, elle s’est engagée sur un second plan lumière, dont l’un des objectifs ambitionnait de réduire la note d’électricité à celle d’avant 1989. Un défi de taille : garder une mise en valeur de l’espace public au moins aussi qualitative, tout en opérant une réduction des consommations. Inspirée par le protocole de Kyoto, la ville ira encore plus loin en 2012 : il s’agit de réduire les consommations d’électricité de 5,2 % par rapport à celles de 1990 !

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