The Spectrumancer
Perhaps one of the more misunderstood magics is that of the spectrumancer, those who can pick magic out of the air around them, and bend it to the shapes they need.
Or at least, that’s what many think. The light around us has many magics, and picking which light is a delicate process, the bludgeon that red provides can be useful, and also easy to control, but the hot sharp knife of violet is often more useful for delicate violence. Those with a milder temperament may reach for yellow and green, for their volume, sending ideas great distances and whispering in the ears of giants, and the healers may reach for blue's warm touch.
But none of these wonders are reachable without a good light. White is best of course, then you can pick and choose what you need, and sunlight usually will do the trick, provided the day is not cloudy out. But spectrumancy didn't really pick up until man could create white light of it's own, because fire and moon light would not meet their delicate needs.
All in all, it's amazing what one can do with a flashlight and a prism. And once the spectrumancer grows strong enough, any light at all.