I've been looking at some of the automated aquarium lighting systems that turn on and off automatically at certain times of the day (and even mimicking the gradual change of sunrise/sunset).
But these systems always seem to be based on a timer.
Is there a system that follows the seasonal changes (the changing times of sunrise/sunset throughout the year)? Either an algorithm that mimics the approximate progression of sunrise/sunset throughout the year, or a sensor that actually detects the ambient light levels would be okay.
Apart from any beneficial effects for the fish, it would be nice not to have the lights turning on before the crack of dawn or turning off at 5:50pm (in the middle of the day) because I haven't reset the timer since last December.