Solar radiation generates blue light through a natural interplay of energy and atmosphere. The sun's core emits electromagnetic waves spanning the visible spectrum, with blue light wavelengths falling between 400 and 495 nanometers. The blue light, having a wavelength between 450-495 nm, is highly effective in photobiological effects. Every ray of sunlight contains blue light, along with red, orange, yellow, green, and violet, but blue light has a higher energy level compared to its neighbors on the spectrum. Fluorescent and LED (light-emitting diode) light bulbs also give off blue light.