The speed at which electrons move through space can vary depending on the circumstances. In a conductive material, such as a wire, electrons can move with an average drift velocity that is typically quite slow. The drift velocity is the net velocity of electrons in a particular direction under the influence of an electric field. In a typical household circuit, for example, the drift velocity of electrons is on the order of a few millimeters per second. However, it's important to note that individual electrons within the wire move with significantly higher speeds due to thermal motion, but their overall net movement is relatively slow.
On the other hand, the speed of light, denoted by the symbol 'c,' is a fundamental constant in physics. In a vacuum, light travels at a constant speed of approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed is a fundamental limit in the universe and is denoted as the speed of light in a vacuum.
It's worth noting that the speed of electrons through space and the speed of light are not directly comparable. The movement of electrons through a material is influenced by various factors, while the speed of light in a vacuum is a constant that represents the maximum possible speed of information or energy transmission.