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High Pressure Sodium Lamps
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6 Structure of a high-pressure sodium vapor lamp | Download Scientific Diagram
70W Clear High Pressure Sodium Lamp ED23 52V
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Still Need to Replace High Pressure Sodium Bulbs? - LIGHTING SUPPLY
Sodium-vapor lamp - Wikipedia
File:High Pressure Sodium Lamps.JPG - Wikimedia Commons
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Plantmax – 150W High Pressure Sodium Lamp – Allstate Garden Supply
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