I love my Gorilla tents and the height extensions available, I was able to even take my little 4'11" Gorilla shorty up to 6'11" with an extension. I had to downsize from my 4x4 to my 4x2, that I usually use full time for a veg tent, for a little while since we moved.
As far as the light, look at the Atreum Hydra 3200. I have their older DIY bar lights for my tents. REALLY even and strong light distribution. Now they're transitioning to all plug and play lights. Their new Hydra 3200 is a beast. Great company to deal with. Just saw this video last night. There's a coupon code in the vid take the price to like $375 or something. Their bar lights fit perfectly in my 4x4 and 4x2. If you have a 4x3 you'll have a bit of room on either side. Like about 6 or 7 inches.
If their site looks empty if you go to it, it's because like I said, they're transitioning from the kits to ready to go lights. Also on Amazon, but the coupon is probably only available through the site. They're a USA company FWIW. Good luck with whatever you decide on.
The HYDRA-3200 320W Full Spectrum LED Grow Light is perfect for 2x4-ft to 3x5-ft grow areas. Proprietary, algorithmically-spaced LEDs reduces hotspots for superior uniformity and results in higher yields than traditional LED grow lights.
atreumlighting.com