Have a 5x5 Vivosun tent, and two HLG LED’s that pull 298 watts a piece on the highest setting but have to dim them down to about 3/4 and keep them 22” above the canopy.
Also intermittently use a Mars Hydro that pulls 136 watts. I use Coast of Maine Platinum and mix it with FoxFarm Ocean Forest.
I add nothing but water through the entire grow. Have been doing it this way for about two years now with excellent results.