Today I noticed I don’t see those nice newly-sticking lightspells, because, as so many, I got mage spells turned off to increase performance.
However this specific spell only is casted in groups for all others to see, to lighten up dark places… so I don’t think anyone wants to turn it off with all others and it’s also not decreasing performance like a quick series of fireballs or such.
Though I got no clue how complicated it would be to exclude this one I think it really should be excluded, turning on all mage spells just for that would decrease dungeon performance too much (not only technically, I simply see less of the fight with flashes all around me), to be worth it.