Lumens per Watt & LED Efficacy - Aurora Lighting Presents - YouTube
Lumens vs Watts: What's The Difference? - Moonlight Design
GE Lighting LED Night Light Bulb (0.5 Watt), 3 Lumen, C7 Light Bulbs with Candelabra Light Bulb Base, 2-Pack LED Small Light Bulbs, Clear, 8.6-Year Life, (13887) - Amazon.com