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Feit Electric 150-Watt ED17 Shape Clear High Pressure Sodium E26 Medium Base HID Light Bulb (12-Pack) LU150/MED/HDRP/12 - The Home Depot
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Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium
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GE M250R1 35watt High Pressure Sodium Street Light - YouTube
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Sunlite 03635-SU LU150/MOG 150 Watt High Pressure Sodium Light Bulb, Mogul Base (E39), ANSI Code S55, 16000 Lumen, 20000 Life Hours, Clear, 2100K - High Intensity Discharge Bulbs - Amazon.com
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File:High Pressure Sodium Lamps.JPG - Wikimedia Commons
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60W high pressure sodium Replacement lamps 5000K – OkayBulb
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