Anything compared to Duskvol is sunny. That city and its atmosphere is so oppresivley dark and dreary. The sun literally doesn’t shine and no stars illuminate the night sky.

I don’t find Cthulhu horror that dark. Damp and misty sure. With the cosmic/existential horror being rooted in ones insignificance and the ungraspness of the infinite existence there is little explicit need for darkness. It can be dark yes, just doesn’t need to be.