E40 100 W TWINARC sodium vapour lamp, clear | Lights.co.uk
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Sylvania 67504 LU70/MED | HID High Pressure Sodium Lamp | CityLightsUSA.com
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iPower 600 Watt Pressure Sodium HPS Grow Light Bulb Lamp and 1-Pair 8-Feet Rope Clip Hanger, Combo Set for Indoor Gardeing
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Sodium-vapor lamp - Wikipedia
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
Sodium | Elements | RSC Education
