Direct sunlight

[Basile]

This morning its a very sunny day and my fish room is illuminated by two big windows, that'll have controll with blinds. But as of now my system is still dry and the sun is shinning on my sculptures that i've done for my tanks. And as it shines on them on a different angle than the lights that i'll be using to light up my tank, i'm asking myself about sunlight itself, beyond the obvious answers of algae blooms and other problems that direct sunlight can cause on aquarium tanks, is their any benefits of direct sunlight on a system at all . In any situation their's pros and cons; their's must be some in this case as well any thoughts on this. As humans we get vitamin C from are skins do the corals of fish get anything from it. Thanks for your input, very curious about this.