Lightcap 2: Basics of light and its effects on humans

Light is one of our most valuable resources on this earth. It makes the world visible to us, is the major driver of the 24-hr sleep-wake cycle to which not only humans, but virtually all life on earth (fauna and flora) submits. In fact, there would be no life on earth without light. It is therefore hard to overestimate the impact light has on humans, biologically, psychologically, socially. And yet, we hardly ever think or speak about light. LIGHTCAP’s 2 “Basics of light and its effects on humans: Light, cognition, alertness, sleep” covers light as a physical phenomenon and introduces importa…