Light green/lime green new growth

i've had lime green thing going on before it can be not enough nitrogen so that's one reason for sure, now i'm sorry and don't mean to scare you as well this happened to me for 3 grows bro and i researched it a lot! the first time it happened was in flower for me and..it didn't make it smh it was root rot and it was growing very very slow, now another reason is when your in flower and it's towards the end of flower those leaves will eventually turn yellow you want to take those leaves off that's normal if your basically done with flower and tbh that's how you know your nuggets are ready to come down! so there's good news and bad news in it but def make sure if it is root rot use some hydroguard best stuff ever man will basically kill your root rot tbh i use hydrogaurd from beginning to end, keeps your roots healthy as can be !

Because the new grow are light green and while they are getting older they are also getting darker and it will repeat with every new nodes . Lowest branches are often removed during the stretch because they are weak are low producers

The yellowing around the big fan leaves means a problem. Only new growth should be lime green.

With all the purple light I can't judge the real color of your leaves, but keep in mind that dark green leaves are a sign of excess of nitrogen; healthy leaves are light green. Your top leaves look fine to me

Hi @Csmithch this light green on the tops is chlorosis, as these tops are growing and stretching they do not contain the same amount of nitrogen that is already established in the rest of the plant, as in the older leaves that are well loaded with nitrogen, nothing to worry about. your plant looks great and healthy. good luck mate 🙏👍