spectral power distribution

Spectral Power Distribution (SPD) is a way to describe the range of light wavelengths emitted by a light source, showing how much power is present at each wavelength. Essentially, it tells us what colors of light the source produces, from ultraviolet to infrared. SPD is important in fields like lighting design, photography, and color science because it affects how we perceive colors. A light source with a balanced SPD will render colors more accurately, while one with an unbalanced SPD may distort them. Understanding SPD helps create environments that enhance visual experiences.