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      Low-pressure sodium vapour lamps with a U-shaped discharge tube enclosed in a clear tubular outer bulb under vacuum that is maintained by a solid-state getter

      Benefits

      Highest reliability ensures the lowest total cost of ownership
      Stable power consumption through life maintains low energy use and contributes to low cost of ownership
      Extremely high luminous efficacy; the most efficient light sources for road, security and tunnel lighting

      Features

      Philips Solid-state Getter (PSG) for highest reliability over life
      Uniform sodium distribution in the discharge tube by means of dimples for a more stable discharge, stable power consumption, shorter run-up time, higher efficacy and better lumen maintenance and lamp life
      Monochromatic yellow color with non-existent color rendering
      Burning position SOX 35 W and 55 W: base-up ±110° (universal burning position when luminaires installed in shock-free positions)

      Applications

      Road lighting, railway marshalling yards and crossings, airports, harbours and docks, quarries, foundries and rolling mills
      Security and orientation lighting
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