Do you think this will be enough light?

[Bugeater281]

So I’m setting up a 135g acrylic tank. I have this 220w led blackbox(has timer programming in it. I know a photo probably isn’t enough to say for sure or not. But I figured I could get some opinions. I could always build 2 20 led lights for each side(all my other tanks on using homemade led lights). Also, I still have a lot of stuff to do before this tank is set up. So don’t hinge too hard.

 

[Graffiti Spot]

If your only wanting to keep corals happy in the middle 18” of the tank then sure it will be enough. Would I run it like that? No, I would buy another one of those fixtures and put them side by side to fill the whole tank. Good luck with the new setup!

 

[Dsdman]

I can't tell for sure but mine looks to be the same, I have a VIPARSPECTRA 300w LED light for my 65 gal tank. This light is 31.5 inches long and 8.5 inches wide. It has a blue channel and a white channel. I also have an orbit Marine IC lighting system. But it puts out so little light I was not able to keep some corals. It does make a nice mount for my new light however. Since I have added the 300W I have not ran the white channel more than about 10% power...well I did have it at 25% but that caused a GHA explosion I'm just now getting a handle on...so I've dialed it back to not much, like 3%. The blue channel I started at 25% and have increased it to 32% trying to get my softies and GBTA acclimated to it. I wish there was a specific formula for the lights to tank to inhabitant but I think its trial and error, adjust, observe, react, adjust, observe change water, react, rinse repeat....

I'm also open to any suggestions, short of buying/renting a light meter-which I still wouldn't know how to translate into actionable settings.