2x Hygger 957 on 75 gallon

Noticed I was getting poor coverage front to back so I’ve added a second hygger 957. I see mixed things online about running both at 100%. I have them dialed back to 80% for 8 hours a day (plus sun up and sun down). I’ve got a mix of plants, Anubias placed out of direct lighting, parrot feathers, Ludwigia, alternanthera, hydrophilia. I am a beginner to planted freshwater tanks specifically but been in the hobby for many years. Not currently using co2.

I dose excel, thrive all in one, and a half dose once a week of flourish.