You are going to spend many days looking at light, and you should think about what it is. Light is quite interesting.
It is one of those things Albert Einstein wondered about and never found the answer to. When he had figured out the relativity theory as a relatively young man, he stated that he would spend the rest of his life understanding what light is.
When you walk about and look for magic light you may spend some time philosophizing about if light is a wavelengh, particles, a life form or something else?