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REMARQUE : La durée de vie de la lampe d’un projecteur est une mesure du
niveau de dégradation lumineuse seulement, et n’indique pas que la lampe va
tomber en panne et arrêter de marcher après cette durée. La durée de vie de la
lampe se définit comme le temps qu’il faut pour que plus de 50 pourcents d’un
échantillon de lampes voie sa luminosité diminuer d’environ 50 pourcents par
rapport au nombre de lumens nominal d’une lampe en particulier. La durée de
vie d’une lampe n’est absolument pas garantie. La durée de vie actuelle d’une
lampe de projecteur peut varier en fonction des conditions ambiantes et du
mode d’utilisation. L’utilisation d’un projecteur dans des endroits difficiles, par
exemple des endroits poussiéreux ou chauds, pendant de nombreuses heures
en continu et avec un arrêt brusque va réduire la durée de vie de la lampe et
peut même causer un mal fonctionnement.
112


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