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Ben Krasnow on Twitter: "You can still buy low pressure sodium lamps (eg on Amazon), but the ballasts are expensive and rare. I found that using a cheap CFL ballast, and replacing
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The Sodium Lamp - How it works and history
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Low Pressure Sodium Vapor Lamp - First Strike - YouTube
The Sodium Lamp - How it works and history
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SOX Sodium, LPS or low pressure sodium lamp warming up. The lamp gradually turns from red to orange as the neon discharge warms the sodium metal up Stock Photo - Alamy
Palomar Skies: Why Astronomers Love Low-Pressure Sodium Lights
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