File:110213 LED vs Sodium vs Mercury.jpg

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English: Crossroad in Alessandria, Italy. Road lights with mercury lamps are in the background, LED street lights are in the middle, while high pressure sodium lamp are in the foreground. Supposed superiority of "blue-while" lighting is at best questionable for common road applications
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Author GiancarloGotta

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23 October 2009

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current15:49, 13 February 2011Thumbnail for version as of 15:49, 13 February 20111,152 × 768 (89 KB)GiancarloGotta{{Information |Description ={{en|1=Crossroad in Alessandria, Italy. Road lights with mercury lamps are in the background, LED street lights are in the middle, while high pressure sodium lamp are in the foreground. Supposed superioriry of "blue-while" l
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