Lighting for 50gal Lagoon

[Intheflesh]

I am downsizing from a reefer 350 to and IM 50 Lagoon. I currently have 2x xr30 g4 pro'. The new tank is 30"x24". Would I be okay with one xr30 or should I go to 2 xr15s for a little better spread? i have a feeling like I know what the answer is going to be.... but I'm trying to reuse equipment where I can.

 

[Esage]

What kind of coral are you going to keep ?