I only see the 288 v2 available and that is better than the 304.
In a 4x4 I would get 2 of these kits:
https://growerslights.com/collections/horticulture-lighting-group-quantum-board-led-kits/products/horticulture-lighting-group-260-watt-xl-quantum-board-led-kit?variant=8194482765925
or one...