That first picture is incredible..
that plant is something special.. LOL... It is so tall and lanky and couldn;t harvest a gram.. and yet it is so freaking beautiful in its very own way...
the leaves in YOUR CASE... are yellow because it is hungry as a mofo.. it is DYING for nitrogen... feed slowly!!! lots of water with small nutrients..
the nodal spacing is atrocious because of lack of light... a plant with 4 - 6 nodes should be 4-8 inches tall.... you have a plant that is STRETCHING.. classic stretching...
It looks exactly like one of the first plants I ever grew. with almost the same lught set up.. LOL...
rep+ for a GREAT photo..
iloveyou