"It was a dark and stormy night."
A cliche sentence we all recognize, if for no other reason than seeing Snoopy, the famous comic-strip beagle, sitting atop his doghouse with a typewriter. Still, the sentence invokes a certain aspect. In seven (7) words, your mind has embraced the atmosphere of the tale, the ambiance, if you will. There is an ominous boding within that sentence.
Again, your mind quickly envisioned a lady of the evening highlighted by the street light as she plied her trade in the dark of night. That one sentence flooded your imagination. Add another and the story takes form.
Suddenly, the reality of the situation is revealed.
Definitely a different angle for the story line.
Light can only exist with darkness. And darkness can only exist with light. The two are tied together and together they can lift your writing skills new heights.
Think of it this way. You watch movies and so much of the magic the viewer enjoys is because of the lighting the director has chosen to use. Not enough or too much and the movie can flop or fail. Shadows are used to scare you. Bright sunny scenes are there to lift your spirits. The same should hold true in your writing.
Create and play with the shadows for tension, fear or surprisingly, magnificence.
How can that be?
Shadows need not be ominous every single time. Also, light need not be the gentle lift of the soul, either.
You can turn on a light in a room —
Or you can do it better with —
By seeing the light... or the dark... you can add more to your story. Your story is like a movie as the reader progresses through the pages. Using light and dark to enhance the ambiance of your story is to your advantage. Readers will see more if you turn the light on for them.