Your light can be the most costly item you’ll buy, so I’d recommend checking out some lighting videos from Migro on YouTube. I learned a lot about the science and what to look for, especially PAR maps and spectra for various lamps. High quality Samsung LED diodes (LM301b or h) are a good investment. Trusted recommendations here can help tip the scales.
I also agree with
@Goodshit97 to buy
what you’re pretty sure you might want if/when you upgrade, not just what you think you’ll need now.
You’ll want an LED lamp that completely bathes the floor
and corners at the proper light density.
Also, matching the exhaust fan to the cubic space is important, as is matching the light to the tent’s footprint. Someone here suggested buying a higher output fan and turning it down—I agree.
ACInfinity makes very high quality fans and filters, and an excellent environmental control phone app that makes growing more automated—great if you’re growing in a shed and don’t want to run back and forth to check your grow.
Are you planning to grow autoflowers?