I am new to growing and my lower leaves are turning yellow I think it nitrogen deficiency but would like other opinions.

Those first set of leaves are called cotyledon leaves and they die off naturally after other leaves have grown.

Yeah the light is terrible its a mood light that my friend gave me for seasonal defective disorder 😂 but I ordered a Mars hydro ts1000 it’s in the mail right now but it’s my first grow so I’m really just experimenting so I do t get some good seeds and butcher them

Definitely not those turn yellow and die normally but how for is your light from them they look stretched?