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Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium
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Sylvania Lumalux Plus® Ecologic® High Pressure Sodium Lamp, Et23.5, 100 Watt, 55 Volts, E39 Mogul, Clear: Amazon.com: Tools & Home Improvement
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Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium
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Sylvania LU150/55/MED 150 Watt E17 High Pressure Sodium 2100
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70W High Pressure Sodium Medium Base Lamp
