Mistake #2: You Hang a Few “Indoor” Lights Outdoors
Many holiday lights manufactured today are intended for both indoor and outdoor use, but you may come across some that are location specific. Indoor lights aren’t as resistant to moisture, which may cause electrical shorts and damage in wet weather. Many products tested for safety in the United States are labeled with a UL tag (for Underwriters’ Laboratories, a certification company that inspects such products). Indoor lights have a tag marked with a green UL. Outdoor lights are marked with a red UL.