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Sodium-vapor lamp - Wikipedia
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GoodBulb 50-Watt High Pressure Sodium HID Light Bulb | E39 Base ED23 1/2 ANSI Code S68 | 2000K Warm White Light Color | Clear Finish | 24000 Life Hours | Pack of 2 Bulbs - Amazon.com
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250 W Clear Tubular SON-T Sodium Lamp, GES/E40, 2000K, 46mm
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Sodium Vapour Lamp
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Sodium-vapor lamp - Wikipedia
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OHLECTRIC T53 Low-Pressure Sodium HID Clear Light Bulb | 1800 Kelvin White Color Light with BY22D Base | 55-Watts Energy Efficient Bulb (Pack of 1) OL-50948 - Amazon.com
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