God made Light to dispel the darkness.  The darkness is home to all sorts of evil and the light will drive it away.  

God also works in the darkness.  When Moses stretched his hand over the Red Sea, the Lord caused a strong wind to blow all night and in the light of the next day, the sea was opened and they crossed on dry land.

God will work in your darkest hour to bring deliverance to you.  Keep your faith and trust he will finish that work for you.