How to correctly wire LEDs and minifans into my greenhouse cabinet
Your total power consumption at 5V at 11.2A = 56 W
For efficiency you may want to consider a 75W  power supply or for free, a surplus 250W PC PSU to drive all 4 shelves.   depending on the 250W supply the 5V rail can supply ~ 18A.  Using AWG16 or distributed smaller wiring you can use a common power source.