I mean it sounds as Legit as possible with what you have if you already own this stuff but If you can manage $80 a 150w HPS will work wonders( Yield,Potency,Density) for your plant while flowering if you add it to this setup.
I'm not a fan of HPS's. One...they draw too much power. And two, the are extremely hot. During the summertime, with a stealth grow, you couldn't keep the temps down without an AC. =(
Yeah they definitely do require some exhaust/intake. Well I just made a custom light for CFL's heres the link. Then you could have 8 to 12 CFL's working with your T5 ! & you could mix lots of 2700k & 6500k for Veg/Flower. https://www.rollitup.org/do-yourself/443658-diy-custom-cfl-growlight.html