deficiency or something else ???

I wouldn't say that this is lack of lightning or a simple deficiency. The lower leaves on picture 7 is a sign of Nitrogen toxicity, but i suspect this is much more a root problem than anything else. By looking at your earlier questions, it really looks like the problem is in the roots. I'm sorry to say that your plant looks like it is oversaturated with nutrients, your roots are being choked to death and therefore your plant won't take up any more nutrients.