So we don't mean things like UV radiation and light radiation. When we say radiation, we mean an ionizing form of radiation. So very dangerous rays, for example, X rays and gamma rays, these types of radiating sources. Now, why would X rays and gamma rays be dangerous? Well, what X rays and gamma rays are they're really, really strong beams that carry a great deal of energy. And when those X rays and those gamma rays hit the individual, those beams of energy can basically cause harm to the cells of that body as well as the cellular processes that take place within the body.