It is good light for beginners reef light with full spectrums, low cost light compare to other name brand. The digital controller allow you settings some different light schedules from 0-100% in 5% increments. Only able to change blue and white as I remembered.
I am using HD light for now
They normally eat left over food when you feed the fish. Few pieces of flake should be good every other days
or remove it from the tank if you don't have aiptiasa problems