Since you have multiple BML lights, I wanted to get your advice. I already have a 48" 20k light with 90 degree optics. I wanted to pick up another 48" 20k XB strip for more PAR. What degree optics would you recommend? My corals will be in the center to front of the tank. And how far apart should I place the fixtures? I'm thinking I would slide my current 90 degree fixture towards the back. Thanks. I emailed Cara and BML support but haven't heard back. I imagine they are really busy.