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What is Lumens ?

Lumens are a unit of measurement used to quantify the total amount of visible light emitted by a light source. In other words, lumens measure the brightness or luminous flux of a light source. The higher the number of lumens, the brighter the light source appears to the human eye. Lumens are an essential metric for choosing the right lighting for various applications.

Lumens to watts conversion is useful because it helps consumers and designers make informed decisions about the energy efficiency of lighting products and the amount of light they produce. This conversion is particularly relevant with the shift to more energy-efficient lighting technologies, such as LED (Light Emitting Diode) and CFL (Compact Fluorescent Lamp) bulbs, which use significantly less electricity to produce the same amount of light as traditional incandescent bulbs.

lumens formula

To convert lumens to watts or vice versa, you need to consider the efficiency or efficacy of the lighting technology. Different types of bulbs have different luminous efficacies, which determine how many lumens they produce per watt of electricity consumed. Following equation or formula is used for lumens to watts conversion.

Lumens to Watts calculator

EXAMPLE of lumens to watts conversion .
INPUTS: Light intensity in lumens = 900 , Light intensity in lumens = 15 lm/watt
OUTPUT: Light intensity in watts = 60

Watts to lumens calculator

EXAMPLE of lumens to watts conversion .
INPUTS: Light intensity in Watts = 60 , Light intensity in lumens = 15 lm/watt
OUTPUT: Light intensity in watts = 900

Conclusion : Lumens to watts conversion is a crucial method for assessing the efficiency and brightness of lighting products. It allows consumers to make informed choices when selecting light sources.

Useful converters and calculators

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