Welcome to the group.
If you go with the RSR 170 deluxe it will come with the 1 Red Sea reef LEd. Never had one so not sure about performance.
Like Vetteguy mentioned 2 primes would be good. Both the AI prime and 26 have a spread of 24”, but they recommend keeping it to 18”. The 26 has a few more led and a bit more penetration depth if I remember correct. The 170 is 24 long so if not going with the deluxe version then I would get 2 of the AI. The prime are cheaper, but the 26 may be useful if ever doing an upgrade down the road and the clam, would need the higher par.
Keep us posted on you progress and welcome.