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LU250 HPS Grow Light 250w 2000K E39 Base ET18 High Pressure Sodium Lamp - Walmart.com
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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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OHLECTRIC 55 Watt T15 SOX55 Low-Pressure Sodium HID Light Bulb - 1800 Kelvin - Clear - BY22D Base - OL-50948 - Amazon.com
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Like It or Not, Chicago's About to Get a Lot Less Orange – Chicago Magazine
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Which one has the advantage, LED street lamp or high pressure sodium lamp? - LED Orientalight CO., Limited
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Nichia Europe - High-power 1800K LED from NICHIA offers industry's only true alternative to High Pressure Sodium lamps
Larson Electronics - 400 Watt High Pressure Sodium Light - Class 1 Division 2 Groups A-D - T3b Temperature -50,000 lumens
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