Have you ever found yourself straining to read or work in insufficient light? If so, you likely experienced headaches or eye fatigue after prolonged periods spent in dim lighting. In such scenarios, light can be both the problem and the solution. The light sources available on Earth - the sun, fire, and artificial lighting - comprise only a fraction of the entire electromagnetic spectrum. Among these, our eyes are most receptive to the yellowish-green light at a wavelength of 555nm…
