6 FOOT LONG COOLTUBES

Hi everyone, This isn't going to be a thread where we beat a dead horse over hid, led, or etc etc etc......it's about disussing different hid setups that don't fit the "conventional" standard grow areas. For example I read a book years ago called
https://www.amazon.com/Gardening-Indoors-Hydroponics-George-Patten/dp/1878823329
Now midway there are pictures of various gardens and one in particular has what appears to be a cooltube that's between 4-6 feet long! In interested in this because of the potential coverage and ability for a decent cfm fan to keep em kool. Does anyone who uses hid's have similar ideas?

Usually for vertical growers but not always, they have dual mogal sockets so the tube would run 2 lights. I'll attach a pic so we know were on same page.

my gawd is that thing beastmode dude. verynice