Watts to Lumens Calculator
Convert electrical power (watts) to luminous flux (lumens) based on the type of light source. This tool helps you estimate the brightness of a light source efficiently and accurately.
The estimated luminous flux is: lumens.
Calculation Principle
The conversion from watts to lumens is based on the luminous efficacy of the light source. Luminous efficacy is the number of lumens produced per watt of electrical power. For example, an LED light with an efficacy of 90 lumens per watt will produce 900 lumens from 10 watts of power. This tool multiplies the power input by the luminous efficacy of the selected light type to estimate the output in lumens.
Frequently Asked Questions (FAQ)
Q: What is the relationship between watts and lumens?
A: Watts measure the energy consumption of a light source, while lumens measure the brightness. The relationship depends on the efficiency of the light source, known as luminous efficacy.
Q: Why do different light sources have varying efficacies?
A: Different technologies convert electrical power to light with varying efficiency. For example, LEDs are more efficient than incandescent bulbs.
Q: How accurate is this calculator?
A: The calculator provides estimates based on average luminous efficacies. Actual values may vary depending on the specific product.
Q: Can I use this calculator for non-standard light sources?
A: This tool is best suited for common lighting types. For specialized light sources, consult manufacturer specifications.
