Need help with Diy Cool Tube. PLs Post advice+rep

Ok I am a vertical cooltuber and I want to add on another but two tubes is too high for my setup. What I want s my two 1000 s connected to and from outside air to cool and not displace co2 rich air, closed room.
My first lamps a cooltobe but I never used it to vent before, but now that its summer I have to.
My second lamps a barebulb fixture that I ripped the batwing off because I hang bulbs vertically coliseum style in the middle.....amazing g/w

This is the plan I just got a pyrex tube and ducting to do this. How to monut the light in the pyrex. The Diy shows brass supports and looks legit.

I need some advice so feel free to comment on

P.s The dual cooltubes too big and costs like 250 to get shipped

Bump .....)please help and spread some advice and luv.

I think finding the long pyrex tube is going to be the problem.

No Im adding the small one on top and the tube fits in to be ducted and sealed hopfeully