Even between product lines, BRST remains ONE brand. The "logos" should and do speak to each other, all being constructed with the same rules. Melatonin being a regulator of the sleep aspect of the the circadian cycle, our reflex was to link it to the paradoxal nature of sleep & dreams. Here, the paradox is expressed by the perpendicular relationship between the iris of the shape and its "eyelids".
Dreams are often defined by the juxtaposition of extremes, of reality and fiction. Our gradient was then composed of both "extremes" of the color spectrum; infrared & ultraviolet.