Here are some lumen per watt (LPW) targets for common LEDs
Lumens to Watts Converter
How do watts compare to lumens? - Quora
How to Convert Lumens to Watts? - LedsMaster LED Lighting
Wattage Comparison Chart | Light bulb wattage, Light bulb, Wattage
Lumen to Watt Comparison - Energy vs Brightness
Lumens to Watts: The Key to Buying Replacement Light Bulbs - Ideas & Advice | Lamps Plus
LED Watt Conversion & Light Replacement Guide | idavidmcallen
Watts to Lumens: How to Determine Your Lumen Count - HDVideo Pro
Lumens Calculator: How Many Lumens Do I Need for a Room? – Insights
Lumens to Watts Conversion Chart for LED Bulbs
Lumens to Watts Conversion Chart for LED Bulbs
LED Lumens To Watts Conversion Chart - The Lightbulb Co. UK
How many Lumens for a 400watt Metal Halide and what is the LED equivalent
Everything to Know About Bulbs for Landscape Lighting
Lumens per watt plot with trend lines for LED Lights with bulb. | Download High-Quality Scientific Diagram
compare wattage (~$energy~) and brightness (lumens) of Incandescent~cfl~led... so my guess: 400 lumens is fine for mood … | Light bulb wattage, Bulb, Lighting guide
Wattage vs Lumens: Know the Difference for Better Lighting
Wattage vs Lumens - Know the differences | e-green electrical
Estimating LED Lumens for Your Space | Roberts Electric
LED Light Bulb Brightness Scale & Color Charts | Bulb Guide
Comparing Lumens to Watts in Incandescent Bulbs – Ivins Night Sky
