5x5x6

Hello, fairly new grower here. I have 3 grows under my belt and this year I've upgraded my set up from a 2.5x2.5x5 to a 5x5x6. Adding a new Mars hydro ts1000 in with my old 300w viparspectra and Mars LEDs so 3 lights in total for the new tent. A couple of my questions being, is two 300w LEDs and...