Should i worry about this?

general consensus says its mechanical damage, weather it be my light hit it or i pinched it when feeding or whatever dunno. but its not mites and its not a Ph or Nute Deficieny etc etc. the lights just came back on from being of for last 6 hrs and plants look beautiful still except for just that one leaf with that little pigment difference, so im gonna agree and just say mechanical damage, nothing to really worry about, if i see any changes in other leaves or my other plants ill be sure to let you know though.

Looks like either the leaf has been damaged in some way or could be ph fluctuations,
IMO keep going and wait to see if it gets worse or spreads, this way u know weither u need to do something or not. Sometimes the biggest mistakes we make are trying to fix something that is not broken,
Good luck and happy farming dude!

I don't know if anyone has already touched on this but one of the things that ran through my mind when I saw that was nutrient splash, is that a possibility?

I guess it could be a possibility but its now Tuesday and i see no difference and no spreading to any other leaves or the other plants so i think everything is Okay =)