That's not my tank but it's 24" wide and tall, the back ground in 1". PAR is what the plants see, Lumens are what the human eye see's. I'd call marineland or take to the store and do a side by side. I could be wrong about the marineland being broken, but from what I've seen in person and in other peoples video's it doesn't add up. The lights on the tank in the pic are 24" with 8 LEDs oppose to the 36" with 16 LED's.
I'm not planning on using the marinelands but if I was I'd ask my friend if I could borrow his for a few hours to test on my 30" tank.
I'm not planning on using the marinelands but if I was I'd ask my friend if I could borrow his for a few hours to test on my 30" tank.