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Lightbulbs: Watt-to-lumen conversion chart - Clark Howard
Lightbulbs: Incandescent, Fluorescent, LED (Infographic) | Live Science
How Many Lumens Do I Need - GARET
What is a Lumen? - Interstate Electric and Solar
CFL's vs. Halogen vs. Fluorescent vs. Incandescent vs. LED
Lumen to Watt Comparison
Lightbulbs: Incandescent, Fluorescent, LED (Infographic) | Live Science