How did you plan to use the room? There’s a lot of different stuff you can do. If you like hlg stuff, some 350r’s may be a decent option. Chilled tech has a few medium sized fixtures too.
I think it would be a good idea think through what you want this grow room to look like. Do you have a specific amount of plants you want to run? How about potential harvest quantity target?
Im in a 12x8 with 7 ft ceilings. I have a 350r, 600r, and 320xl in my room. Be prepared to figure out a way to exhaust heat. I have an 8 in but i think i need to upgrade to a 12. Also depending on your climate , be prepared to purchase an AC unit whether window mounted or portable. Ive used a window unit the past year and am purchasing a portable ac unit so i can run the exhaust through the floor.