Why are some streetlights deliberately manufactured to provide illumination with a reddish color?
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Retired industrial electrician. Some good information above. A similar light is Metal Halide. These produce a whiter light. In quality fixtures and with decent ballasts all these lamps last thousands of hours. Light output decreases very slowly. At the end of their life, they start to blink on and off slowly. That’s the time to replace them. Search for high pressure sodium or metal halide for more information.
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