High pressure sodium
Lithonia LPS LD4 ( 25" Rectangular) – cool-lite-inc
Westgate LPS-1X2-D Energy Star Rated 25 Watt 1x2 LED Surface Mount Panel with Internal-Driver Dimmable
The Sodium Lamp - How it works and history
Lumen to Watt Comparison - Energy vs Brightness
Cree Continues to Push the Boundaries of LED Performance by Breaking 300 Lumens-Per-Watt Barrier — LED professional - LED Lighting Technology, Application Magazine
LED Street Light vs HPS/LPS Light | Manufacturer | ZGSM
Details of the 200lm/W TLED Lighting Technology Breakthrough Unraveled — LED professional - LED Lighting Technology, Application Magazine
120 WATT 40 LEDs HIGH-INTENSITY UNDERWATER LED DOCK LIGHT FOR DEEP WAT – Marine Fiberglass Direct
Cree Announces New Efficacy Record in Lab: 231 Lumen Per Watt — LED professional - LED Lighting Technology, Application Magazine
Constant lumen spectral power distributions. A subset of the spectrum... | Download Scientific Diagram
Larson Electronics 200 Watt High Bay LED Light Fixture - General Area Use - 24,000 Lumens - IP65 Waterproof
Sodium-vapor lamp - Wikipedia
Wattage vs Lumens: Know the Difference for Better Lighting
Bollard Light Sources - Bollard LEDs and Lamp Types
The Sodium Lamp - How it works and history
RAB X34-195LTW/U 160 Watt X34 LED Flood Light - Trunnion Mount - 5000K - 20,381 Lumens - 120-277V - White | PROLIGHTING
The Sodium Lamp - How it works and history
Wattage vs Lumens: Know the Difference for Better Lighting
8 Ft T8 Led Tubes - Rated Life 50,000 Hrs. | Olympia Lighting
Lumen to Watt Comparison - Energy vs Brightness
Low Pressure Sodium Lighting - Flagstaff Dark Skies Coalition
How many watt LED Lamp do I need to replace conventional lamp? | Fireflier Lighting Limited
Lumens - Lighting - UK420
Larson Electronics 144 Watt High Bay LED Light Fixture - Class 1 & 2 Division 2 - 18,000
Samsung Achieves 220 Lumens per Watt with New Mid-Power LED Package — LED professional - LED Lighting Technology, Application Magazine
Compare lumens to watts | Any-lamp
