Question: are lumens and lux the same thing?
Answer: The difference between the units lumen and lux is that the lux takes into account the area over which the luminous flux is spread. A flux of 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. ... Mathematically, 1 lx = 1 lm/m2.