Too many lumens?

Okay so i am quite sure i know the right amount of lumens required for each stage of growth but i was wondering if there was a point where it would hurt the plant. In the vegetative and germination phases is there a maximum amount of lumens before it is counterproductive?
 
Im new to indoors growing myself but i think that between 5000lumens or 6000 lumens per sqf is a good average.
 
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