in terms of lighting brightness how do you convert LUX value into Lumens?

Question

for example how much lumens value in a 14 lux light?

Answer 1

One lux is equal to one lumen per square metre, where 4π lumens is the total luminous flux of a light source of one candela of luminous intensity.

The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.

Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 12000 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area to the same level of lux requires a greater number of lumens.
lumens/sq ft 10.76 lumen/sq metre
lumens/sq ft 10.76391 lux (lx)



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Answer 2

They are two different things. Lumens is the measure of illuminance of a light emitting object. Lux is the measure of the amount of light that is being projected onto a surface.

In other words, you'd say a light is emitting so much lumens of light, where as there may be x lux being shone onto a tabletop.

For instance, if you have a lightbulb that emits 1000 lumens, and concentrate all of that light on a 1m² surface, you'll observe that there is 1000 lux on that surface. If the same lightbulb is to be shone on a surface twice as large, you'll only observe 500 lux on that surface.

Lux = lumens/m²

Answer 3

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Answer 4

10.76391 Lux