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OHLECTRIC 55 Watt T15 SOX55 Low-Pressure Sodium HID Light Bulb - 1800 Kelvin - Clear - BY22D Base - OL-50948 - Amazon.com
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Sodium-vapor lamp - Wikipedia
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08714681447345 - Low pressure sodium-vapour lamp - Lamps - e-Bailey | Bailey
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35w Low pressure sodium lamp. - YouTube
