In a lot of settings that have magic, there's usually some kind of spell that creates a magical light. Often these spells are hand-waved as being completely safe (e.g. it's not actual light and just makes things look brighter), but that's not what this question is about.
Light carries actual physical energy, and as many kids with a magnifying glasses have discovered, you can even light things on fire with it. Even a fairly dim incandescent lightbulb produces a lot of heat and can be a significant fire hazard.
It would stand to reason then that a magic light spell might have similar effects and pose similar hazards.
And spells that conjure balls of light might be particularly hazardous, since then you could potentially end up directly irradiating cell interiors and directly dumping all of the light energy into whatever solid object the spell happens to intersect with.
This might depend though on exactly what sort of light is emitted. I would suppose that a spell that emits 5000K blackbody radiation would probably be worse than a spell with a narrower band or only a single wavelength, but I'm not sure. There's also a bunch of other factors, like if it's coherent, if it's directional or anisotropic, and in the case of a light orb, whether it's being emitted from the entire ball or just from a spherical shell.
How dangerous exactly would different sorts of magic light spells actually be? Also are there any other interesting physical consequences?