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streetlights

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gippa1973 | 18:05 Mon 10th May 2004 | Adverts
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why are streetlamps, all amber instead of white?
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Avatar Image sft42
They are yellow lights because they are sodium bulbs which glow at a much lower temp than the tungsten filaments in a house bulb for instance. They take a lot longer to start up as well glowing red for a couple of minutes for the same reason.
19:38 Mon 10th May 2004

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