Last updated on September 8th, 2026 at 12:20 am
LIGHTWATTAGE CALCULATOR
Watts to Lumens Calculator
Estimate light output in lumens from bulb wattage and lighting efficacy. Select a lighting technology or enter a custom efficacy value.
Lighting Specifications
Enter the electrical power used by the bulb or light source.
Select the technology that best matches your light source.
Typical estimated efficacy for the selected lighting technology.
Typical Lighting Efficacy
LED
~100 lm/W
CFL
~60 lm/W
Incandescent
~15 lm/W
Halogen
~20 lm/W
Actual efficacy varies by product, design, driver, operating conditions, and manufacturer specifications.
