Half a croissant, on a plate, with a sign in front of it saying '50c'
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Copper Vapor Lamp

Unearthly Green instead of Sickly Yellow
  (+9, -2)
(+9, -2)
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Sick of the sickly yellow industrial feel of your sodium vapor street or warehouse lamps? Switch now to the unearthly green-blue glow of our new copper vapor lamps. Same idea as a sodium vapor lamp, but (I imagine) a lot more engineering involved!

* Strontium vapor lamps also available for a more festive street atmosphere....

cowtamer, Feb 20 2011

Copper Flame test http://upload.wikim...pper_flame_test.JPG
[cowtamer, Feb 20 2011]

Strontium Flame Test http://www.sciencep...PL.jpg?id=655100233
[cowtamer, Feb 20 2011]

Gas Discharge Lamp http://en.wikipedia.../Gas_discharge_lamp
[cowtamer, Feb 20 2011]

[link]






       But the sickly yellow hides my jaundice! [+]
shapu, Feb 23 2011
  

       Multi-colour LEDs ! They could also be dimmed when no movement in the area.
bigsleep, Feb 23 2011
  
      
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