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| View Original: | 110213 LED vs Sodium vs Mercury.jpg (1152x768) | |||
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| Keywords: 110213 LED vs Sodium vs Mercury.jpg en 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 own GiancarloGotta 2009-10-23 Light pollution in Italy Street lights in Italy Light poles 0 Regulatory road signs in Italy Night in Alessandria | ||||
