If you're curious on your potential options:Yes I have the fluval marine lights. I’m thinking to try to get gently used lights because I would like good quality ones but I’m trying to not spend 1000$ on it at the same time.
Cheapest and best lights I have for my Reefer 300 tank is an ATI T5 hybrid fixture I bought from someone exiting the hobby used for $50. 4 new bulbs for $20 a pop. I got a used Reef90 LED from RedSea for $100 or so for the middle for some shimmer. T5 would also be good enough for you to keep the more difficult corals as well, if you'd want to experiment with that.
Biggest downside is you have to change the bulbs once a year or so. The other downside is the T5 lights have a lot of light spillage. It lights my living room up like a very blue Christmas tree. My T5s are also more powerful than I need as I'm not keeping super demanding corals, and the only way to control intensity on the fixture I bought is how high the fixture is from the tank.
I'm not sure if you'd get so lucky searching for a fixture, but you might. T5s are considered old tech so they are being sold used for pretty cheap where I am. If you don't care about shimmer, you could probably find a pure T5 fixture for pretty cheap too, and that'll be good for almost anything you might want to keep.