How far does light travel from a birthday candle?

Light from a birthday candle travels in all directions, spreading out as it moves away from the flame. In a vacuum, light travels at approximately 299,792 kilometers per second (about 186,282 miles per second). In practical terms, the visible light from a candle can illuminate a space several meters away, but the intensity of the light diminishes with distance due to scattering and absorption. In ideal conditions, light from a candle can theoretically continue traveling indefinitely until it interacts with matter.