Good Stuff 1. We get the ability to see colors and magnificent views, such as the one above. 2. Visible light is also sometimes used in light therapy- which is a treatment of illnesses by the use of light. Bad Stuff 1. Visible light can be harmful if mixed with certain chemicals. 2. Can also be bad if too much of it is reflected on your skin. It can be cancerous. 3. Other than that, visible light is pretty cool! Yep, it's pretty cool.