I thought of that. Just now I've tried flames but it doesn't work. All it does is putting fire to the whole place.

I used Magelight until I found that Flames just strafed where I wanted to see worked really well for a quick look, and cost virtually nothing Magicka wise. Didn't have to switch out spells, either. It's probably not practical for complete darkness, but it works for me on an RP level too, since I like running around with my hand out shooting fire wherever I turn.

Other things I've used were Vision of the Tenth Eye and Vampire's Sight which also doesn't need me to switch out spells (just aren't enough hot keys in Skyrim).