day 50 12/12 wierd oval leaves and yellow streaking

Hi guys hopefully someone wiser than me can help me please. Im at day 50 as you can see and i have 2 problems.
1. some of the leaves at the top of the plant have gone yellow in the middle, after readind sick plant stickys i think it is possibly 2 things, iether a molybdenum deficiency or light stress?? i did move the plant closer to the light about a week ago.

2. Also at the top of the plant i have some smaller 2-3cm long leaves wich are oval shaped and sort of wavey like? i have no idea what is going on but would really appreciate some help please as i am planning on harvesting in 2-3 weeks unless advised otherwise by a more experienced grower. This is a jack flash plant and i am so close to finishing it i really dont want anything to go wrong. Here are some pics thanks,pil.

To me it looks like zinc/potassium def.

Do you have a light leak???It kinda looks like she is trying to revert back to veg to me....which is more serious than your nutrient problem

^ thats what i would say....Answer the light leak question.

There is possibly a small light leak maybe but only small though. There is a 5 inch fan on the side of my cabinet exhausting heat and thats where it may be leaking in from, lights are on at 9am and off at 9pm, from 9pm onwards the room the cabinet is in may have a 60W lightbulb on some nights from 9 til 10. Is this the reason maybe?? could that be why i am getting strange oval shaped leaves appearing at the top of my buds and that the top main buds seem to have grown a centimetre or so in the last few days?. Thanks for the help guys i appreciate it,pil.

jcdws602 said:

Do you have a light leak???It kinda looks like she is trying to revert back to veg to me....which is more serious than your nutrient problem

Click to expand...

yep same here.. single bladed leaves mean trying to vert back to veg stage.

every time ive reverted a plant back i get 3 finger leaves &1 finger leaves kinda mutant shaped like what you got at this point the plant probably wont respond to nutes you could try 1 tsp. epsom salt = 1gal. water but the light situation really throws the plants into a funk