I have the Beamswork EA full spectrum on my 125. 72" . It's medium brightness, fits the full length very well, and is an actual 72" long. I have the 48: Beamswork DA full spectrum on a 100 gallon, 4' tank. It's much brighter, almost too much so, imo
, def no shadows or dead spots. I have a Finnex 48" that is a true 48 on a 90 gallon 4' tank, it's lumen power is almost perfect on that aquarium. But, big difference in the cost. I'm also not crazy about the remote. Works OK.