Power Consumption
0.00
Watts
Lumens to Watts Conversion
Different light sources have different efficiency ratings (lumens per watt)
Lumens to Watts Calculator
Convert luminous flux (lumens) to electrical power consumption (watts) based on the efficiency of different light sources. This calculator helps determine the actual power consumption of lighting systems by considering the luminous efficacy of various bulb types.
Conversion Formula
Watts = Lumens ÷ Efficiency (lm/W)
Multiple Light Types
Support for incandescent, halogen, CFL, fluorescent, and LED bulbs with preset efficiency values
Custom Efficiency
Input custom luminous efficacy values for specialized lighting applications
Precision Control
Adjustable decimal places and thousands separator formatting options
| Light Source Type | Efficiency (lm/W) | Typical Usage |
|---|---|---|
| Incandescent | 15 | Traditional bulbs |
| Halogen | 25 | Accent lighting |
| CFL | 60 | Energy-saving bulbs |
| Fluorescent | 80 | Commercial lighting |
| LED Standard | 100 | Modern LED bulbs |
| LED High Efficiency | 130 | Premium LED systems |
Calculation Example
Input: 800 lumens, LED Standard bulb (100 lm/W)
Calculation: 800 ÷ 100 = 8.00 watts
Result: 8.00 W power consumption
Calculation: 800 ÷ 100 = 8.00 watts
Result: 8.00 W power consumption
This calculator is essential for electrical engineers, lighting designers, and energy efficiency professionals to accurately estimate power consumption based on required light output and bulb efficiency ratings.