The speed of light in a vacuum is constant and is approximately 299,792,458 meters per second (or about 186,282 miles per second). The amplitude of light, on the other hand, does not have a direct relationship with the speed of light. The amplitude of light refers to the magnitude or intensity of the electric and magnetic fields that make up the light wave.
In classical electromagnetism, the speed of light is determined by the properties of the medium through which it propagates. In a vacuum, the speed of light is at its maximum. When light travels through a material medium, such as air, water, or glass, its speed can be reduced due to interactions with the atoms or molecules of the medium. This reduction in speed is described by the refractive index of the medium.
However, regardless of the amplitude of light or the medium it travels through, the speed of light itself does not change. The amplitude of light affects the intensity or brightness of the light, but not its speed.
So, in short, the amplitude of light does not exceed the speed of light in any circumstance. The speed of light remains constant regardless of the amplitude or intensity of the light wave.