Your eyes and skin need the whole - spectrum of light from both inside and outside of your house or office. (cancertutor.com)
These probably won't go away entirely, but a car that doesn't «see» on the same visible spectrum of light as humans won't really need to illuminate the road. (inc.com)
That hot wire emits what is known as black body radiation, a very broad spectrum of light that provides a warm look and a faithful rendering of all colors in a scene. (sciencedaily.com)