A powerful figure dominates the composition, emerging from swirling bands of light and shadow that fill the upper background. The figure's raised arms stretch upward, with open hands and splayed fingers, as if commanding or dividing the space above. His head turns to the left, and his face is partly obscured by strong modeling and dramatic shadows, with a white beard and hair that blend into the surrounding light.

Cracks in the surface are visible, testifying to the work’s age and the fresco technique used. The figure’s garment is rendered in shades of deep rose and mauve, with lighter highlights suggesting folds and volume. The background at the upper left and right corners transitions into a smoky darkness, contrasting with the swirling white forms behind the figure’s head.

The lower left corner of the image is filled with a dense, shadowy area that fades into the figure’s robe. There are visible brushstrokes and subtle gradations of color that create a sense of atmospheric depth in the background. The light falls most strongly on the figure’s right arm and the upper part of the robe, creating a luminous effect against the darker backdrop.

The lines defining the figure’s arms and hands are bold and sweeping, with softer transitions in the modeling of the face and hair. The contours of the robe are accentuated by curving white highlights, particularly around the waist and upper arm. Fine cracks run throughout the painted surface, especially visible in the lighter areas and along the arms and garment. Separation of Light from Darkness is one of the nine central panels on the Sistine Chapel ceiling painted by Michelangelo.

Michelangelo completed this fresco in 1512 as part of his monumental project for the Sistine Chapel.