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Osram SOX90W Low Pressure Sodium Lamp BY22d LPS 21" | eBay
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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
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SOX Sodium, LPS or low pressure sodium lamp warming up. The pink/red glow of the lamp in its warm up stages is a neon discharge from the fill gas Stock Photo -
