Half-lights refer to a state of dim illumination, characterized by a blend of light and shadow. Alternatively, antonyms for half-lights include brightness, gloominess, darkness, and radiance. Brightness refers to a state of full illumination, characterized by the presence of light without any hint of shadow. Gloominess, on the contrary, refers to a state of darkness and sadness, characterized by feelings of melancholy and depression. Darkness refers to a state of complete absence of light, characterized by a lack of illumination, while radiance refers to the emission of radiant light, characterized by brilliance and luminosity. These opposing words offer contrasting meanings, highlighting the nuances of illumination in language.