| If these are antique streetlights, most likely mercury vapor lamps with red yttrium vanadate phosphor, which corrects the greenish light of the mercury discharge to white.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
I only working with the international date format (dd.mm.yyyy).
I lives in Israel, which is a 220-240V, 50hz country.
