These bundles are called photons. We don't notice these bundles with our eyes because they are so small and we see so many of them at once. Astronomers have sensitive instruments that can collect them one at a time. Photons are particularly important when it comes to understanding the processes that produce radiation. All electromagnetic waves, including light, are forms of energy.
Electromagnetic waves are a major means of moving energy around the universe.
A short wavelength photon has more energy. The color of light tells us about the energy of its photons. Electromagnetic radiation is often discussed in terms of its frequency rather than its wavelength, which are closely related. However, we will not discuss frequencies when referring to electromagnetic waves. You can get several million across a period.