How does light emitted from a neon sign differ from sunlight?

The light from a neon light only emits certain colors, while sunlight emits all colors.

Well the light from a neon sign contains only a certain visible colors, while sunlight contains the full spectrum of colors. Neon sign produce emission spectrum.

Notes:

When neon atoms absorb energy and release it, its atomic emission spectrum consists of several individual lines of color. It's not a continuous range of colors, as in white light.