Hello, it's only my second grow with these lamps, and the first one was in pebbles. But the second is a lpa one, like you.
I think you talk about the Bluetooth controller right? I just use the magnetic dimmer when the plants are small then i'm going full blast with just their thing to avoid the big inrush current. One could possibly save money with electricity cost, or lose "yield" if used too much, depending on the observer.