What Are ‘Lumens’?

 

Lumen is the standard unit of measure for total amount of light from a source, in all directions. 

This tells you how much light the torch produces, with no regard for the area unlike Lux.  This is demonstrated by the example below:

 Lumens

 

1000 Lumens concentrated into an area of 1 meter square, would equal 1000 Lux

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BUT

 

 

1000 Lumens,
100 Lux

 

 

 

1000 Lumens spread over 10 square meters, equals only 100 Lux

 

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