In the case of light and darkness, this spectrum is recognised within physics, and it is also dependent on human perception. It may be classified as an aspect of qualia.
The division between masculine and feminine is based on biology but is also dependent on social and cultural ideas, as stressed in the postmodern deconstruction of gender. Most people think of themselves as male or female, although there is a spectrum of gender identities in between, as evident in LGBTIQ+ constructions of gender identities. Beyond that, both Freud and Jung suggested that all individuals have some attributes of the opposite gender, and Jung spoke of two aspects as the anima and animus, the feminine and masculine aspects in both individuals.
The concepts of good and evil, has been essential to many religious outlooks, often thought of in terms of God and Satan. However, even without any religious basis, most people have some concept of good and evil. This comes into explanations in life and ideas about morality. It may be asked to what extent are good and evil 'out there' realities or human constructs?
In writing this thread topic, I am raising the idea of duality and how it is manifest in the various forms which I have described, and others. To what extent is the concept of qualia useful for understanding aspects of life, such as light and dark or night and day? To what extent is binary opposition essential as a metaphysical reality or, are opposites bound up with human constructs and meanings? Also, the whole experience of duality and continuum is a matter for reflection as being central to human experience.