I bought the nano light. Now own the 24” and 15” for two other tanks! The app is super easy and bug free. They level of control is incredible. Also the shroud is built so that from all side, and even hen viewing from below its nearly impossible from any angle to see the LEDs. This makes it great to view the tank without bright lights shining in your face.
I’ve actually lost count of how many I have. The phone app is really nice too as you can control the output easily.
I run these in conjunction with other lights to hit those sometimes pesky shadow areas. Easy to move from tank to tank when need.