With its ramp up and ramp down feature, and 24 hour timer does this thing stay on 24 hours after it ramps down for the night? Or does it go to the lowest setting (PAR) in the blue light setting? Is this safe for the fish and corals? Is it to much light? I just want to know if the thing goes off completely so the fish can sleep or if I should turn it off. This thing is kinda confusing.