Venting this room- please give your opinions

Would this be a good way to ventilate my rooms? If not, I would appreciate any suggestions. I am in a race against time to get this flower room done...

What's confusing me is that i've heard people talk about venting the grow and venting the light..with this setup I would be doing both right? Because the fan is venting the light, but it will also suck hot air from thge rest of the room correct? The hot air would be blown into the attic. Keep in mind the temps here in the Summer are almost always over 100 and the humidity ids like 10%. Should I be ok or will I have to worry about mold, etc?

first of let me just say your art work is first class! you must of went to collage studying art! lol every thing looks fine there except you should really have those ac vent down low so the cool fresh air is in the opposite bottom corner of room1
also the way your venting your light is also venting your room this is the way i do it and works great! people who have heat issues doing it this way also have a seperate fan cooling room

Ya haha, I don't like to brag, but i've dabbled in some proffesional art work. So I should just extend my ac where I have the Y connector, and bring it all the way to the floor?

lol yes or if you can bring it down to the bottom from outside then in room! only suggesting this way because once your plants are growing you will kill for that extra 6-8 inches of space that the ducting is taking up! if space isn't an issue then do it the way you said.