Hi Bud, It probably wont be enough for High light corals. But in general it should work fine!
so your looking at (guessing) 50 par on the sandbed, lps some zoas some shrooms
unfortunately I have found really zero real par info in the Kessels, I wanted them for my cube 20x20x20 but got no solid Par answers.
with the width of the tank Id be a little concerned about losing intensity to get the spread at the distance.
If your getting a good deal go for it. If your buying new, consider the Maxspec razor series in the same price range on ebay right now(new series coming) or something with that configuration(two led clusters)
Or a 16in fixture like an SB ramping.
The Razor 120w I did buy (finally!)for the cube after years literally of research has some very good power would be better suited for your wide tank than my square one.(kind of a bummer my own fault though) so I may be changing lights.

, Yea thats what my wife said"

".
Kessels calculator, no Par info but coverage info.
http://www.kessil.com/aquarium/calculator.php
if you want you can look at this on the spread I have.
https://www.reef2reef.com/threads/lighting-upgrade-with-a-lux-meter-saltyfilmfolks.248417/