Lumen ratings, coverage area
Does anyone know - bulbs are usually rated in lumens, such as 4,000 or 6,900 lumens. Is this basically the same thing as lux? I know lux is the amount of lumens per square meter (10.76 sq. feet IIRC) so does a rating of 4,000 lumens mean that the light if placed at a specific distance, one that would cover those 10+ sq. ft., that the lux reading would be 4,000?
Any links to data that explains this?