Many people are familiar with the old shooting adage “One is none.” This concept of “safety in redundancy” holds true for many more topics than just weapons. For example, I carry several lighters in my outdoor gear, just in case one gets damaged or lost. I carry multiple cutting edges too, to provide back-ups in the event of loss, loan, or breakage. I’m a big believer in multiple flashlights, and I like to have a light within arm’s reach at all times. These are the five types of lighting that everyone should have.