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Low pressure sodium, high pressure sodium, high pressure mercury and metal halide
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All 4 different industrial light bulbs.
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LED vs High Pressure Sodium/Low Pressure Sodium
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Low Pressure Sodium Lamps | High Pressure Sodium Lamps | Metal Halide Lamps | Which is Better?
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More vaguely-informative ramblings about low pressure sodium lamps
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The High Pressure Sodium Light: Ubiquitous, effective, but good?
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Philips 90W Low Pressure Sodium Bulb (SOX90)
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Low Pressure Sodium Lamp start up
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Philips 55W T17 Low Pressure Sodium Bulb (SOX55)
0:06:08
The Low Pressure Sodium Lamp
0:14:58
The Shocking Hydration Mistake Slowly Killing You | Dr. Barbara O'Neill
0:13:58
Low Pressure Sodium Vs High Pressure Sodium Lamps
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Philips 18W T17 Low Pressure Sodium Bulb (SOX-E18)
0:03:10
Fluorecent vs high and low pressure sodium vs L.E.D.
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Self-starting High-Pressure Sodium lamp.
0:13:22
Lustra 55watt Low Pressure Sodium Security Light Fixture
0:11:26
Low Pressure Sodium Lamp -- SOX 35 Watts
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The High Pressure Sodium Lamp (HPS)
0:21:40
The LED's Challenge to High Pressure Sodium
0:10:36
Low pressure sodium, high pressure sodium, high pressure mercury and metal halide
0:00:37
High Pressure Sodium fixtures Cobra Heads , Low Pressure sodium, GE AEL find me on eBay francuacr75
0:15:39
How HID BULBS/LAMPS AND BALLASTS Work- Metal Halide, High Pressure Sodium, & Mercury Vapor
0:03:14
High Pressure Sodium 50watt Canopy & Tunnel light fixture (HPS)
0:03:25
11 Sodium High and Low Pressure
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How to Wire High Pressure Sodium Lamps?
0:05:20
Philips 18w SOX-E (Low Pressure Sodium) Bulb.
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