Im not fan of cooltubes, but I used them in my first grow cause I had no AC and they did a wonderful job.
I believe if you use a cooltube for that bulb you'll be able to extract the warm air faster. The problem is that you'll need another fan too, but keep in mind temps are getting warmer so you'll need a solution one way or another.
If you manage to push the air from the cooltube outside of the room, I'm 100% sure this will work for you.
I just saw you messaged me - you can look through the last asesino journal and you'll find a detailed explanation how to do it.