Sodium-vapor lamp - Wikipedia
OHLECTRIC 55 Watt T15 SOX55 Low-Pressure Sodium HID Light Bulb - 1800 Kelvin - Clear - BY22D Base - OL-50948 - - Amazon.com
Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium
Like It or Not, Chicago's About to Get a Lot Less Orange – Chicago Magazine
Larson Electronics - 400 Watt High Pressure Sodium Light - Class 1 Division 2 Groups A-D - T3b Temperature -50,000 lumens
The Sodium Lamp - How it works and history
Lu Standard (110V-130V) High Pressure Sodium Vapor Lamp/Bulb/Light - China High Pressure Sodium Lamp and Lu Standard Sodium Lamp
LED Lights VS HPS Lights - TACHYON Light
Sodium-vapor lamp - Wikipedia
High Pressure Sodium – Industrial Light and Power
LED lighting increases the ecological impact of light pollution irrespective of color temperature - Pawson - 2014 - Ecological Applications - Wiley Online Library
LU250 HPS Grow Light 250w 2000K E39 Base ET18 High Pressure Sodium Lam – BulbAmerica
400W Half Mirror Coated High Pressure Sodium Lamp with Self Factory (SON-ED400 E40) - China High Pressure Sodium Lamp and Sodium Lamp 400w
The Sodium Lamp - How it works and history
Venture Lighting LU400 :: High Pressure Sodium Lamp, ED18, 400W, Clear :: Gexpro
Like It or Not, Chicago's About to Get a Lot Less Orange – Chicago Magazine
15V20W Low Pressure Sodium Gp20Na-1 Automatic Polarimeter Light Bulb Polarimeter Sodium Ligh
Amazon.com : Plantmax PX-LU400 High Pressure Sodium Lamp, 400-watt : Plant Growing Light Bulbs : Tools & Home Improvement
High- and Low-Pressure Sodium Lamp | SpringerLink
Venture Lighting, Lamp Technical Section - Color
737 Sodium Lamp Images, Stock Photos & Vectors | Shutterstock
The Sodium Lamp - How it works and history
The Sodium Lamp - How it works and history
Lighting Comparison: LED vs High Pressure Sodium/Low Pressure Sodium
Colour temperature preference | Marshalls
The Low Pressure Sodium Lamp
