Light does not accelerate to the speed of light. In fact, according to the theory of relativity, light always travels at the speed of light in a vacuum, denoted by the symbol "c." This speed is approximately 299,792,458 meters per second.
In the theory of relativity, it is postulated that the speed of light in a vacuum is a fundamental constant of nature and is independent of the motion of the source or observer. This means that regardless of the motion of the source emitting light or the motion of the observer measuring the light, the speed of light remains constant.
From this perspective, it is not accurate to say that light accelerates to the speed of light. Instead, the theory of relativity tells us that light is always traveling at this speed. The theory of relativity also states that as an object with mass accelerates, it approaches the speed of light, but it can never reach or exceed it. However, photons, which are particles of light, have no mass, and thus they always travel at the speed of light.
It's important to note that the theory of relativity provides a framework for understanding the behavior of light and other objects at high speeds, and it has been extensively tested and confirmed by experimental evidence.