Let's give you a totall view of the tank first.... See the pendant hanging??
- The HC ( foreground plant ) had to adjust to the high light levels. It was burned when planted
- I had Mayaca fluviatilis growing : had troubles with the high light. Getting pale half-way the tank. No shortage of any nutrient, just too much light.
The pendant has 6 x 54 Watt (= 324 Watt totall) at 90 Gallons. So it is 3,6 W/G. But with the very effective reflectors and cooling by fans, I gain approx 40% - 60% extra. In reality it's more like 5-6 W/G
I hanged the pendant a little higher and dimmed the lights to 80%.