The photo was pretty helpful for showing the falloff.
If I am going for an island style layout on the tank, I think a lot of the fall out will be mitigated because it will be mostly foreground that is shaded. Thinking of using crypt parva.
Do you have an opinion on the twinstar 600s range and its coverage?
My wife says I have an opinion on everything..
My only real take on the Twinstar is w/ that price they could at least include a dimmer..

45 fairly efficient watts but the farther away from square the less ideal it is..
Island style isn't something I've ever really "worked" at.
I'm pretty sure I'd prefer 2 cheaper light vs 1 expensive of that style..
Oh you need to be aware of my bias.. I don't like fish going in and out of light thus I will conscientiously or not favor a more blanket lighting approach.
Leads me to square lights for square tanks, rect. lights for rect tanks.
Doesn't imply any are wrong.. just not right..

I'd probably sacrifice some power and go w/ the chihiros2.
The sbreef is about as far as I would stray from that.
As a constrast.. t5 60gal cube..
A "look"' like that in LED takes some work..Like 2 strip lights or strong "puck" hung high..
What provides the light is less important than the geometry of delivery.
There isone other sort of off brand light that works well.
Thier spectrum layout is err odd but works..
You will need to search the worlds.....
Keep in mind China direct but price and function is good.
DSunY LED Aquarium Lighting Plant Lamp For Aquarium Tropical Plants Freshwater
Channel 1(11pcs): 10 Day white 6500k, 1 Cool white 14000K
Channel 2(3pcs): 1 410nm Purple , 2 450nm UV
Channel 3(15pcs): 3 Blue 470nm 3 Red 660nm , 1 Royal blue 450nm ,2 Green 520nm, 6 Cool 14000k
Channel 4(11pcs): 10 Natural white 4500k ,1 Cool 14000k
LED Quantity: 40PCS Bridgelux Bxce Bxcd LED
Power Consumption : 100W (save more than 15%)
Secondary Optical Lens: 120 lens
Lumen: 5000 lm
PAR Value: 720
[email protected] for len can output more PAR
Recommend Size of Tank(L/W/H): (16"-24") x (16-24") x 24"
Light panel Dimension: 12" x 4.7" x 2"= 29cm x 12cm x 5.5cm
ch 1 and 4 w/ that oddball 14000k diode is err annoying.
I've helped people customize a panel to be more normal.. Screws w/ the presets though..but fully programmable.
Circled is where their "moonlight" was but now runs "sunrise" 2 warm whites and a 660nm red.
ch2
A test lighting before shipping..
Anyways "customers"tank..