street light

  1. eveares

    Can LED's reach the same efficiency (Lumen per W) as Low Pressure sodium lamps?

    I don't know how much additional power percentage wise relative to the bulb a SOX lamps ballast takes up, but can LED's achieve the same or greater lumen per what ratio that Low Pressure Sodium/SOX achieve? I am well aware of the awful colour rendering and CRI of SOX lamp's mono chromatic light...
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