They like the darkness and tend to live in storage sheds or attics or other areas that might not be frequented by people or light. If you have a need to be in your attic, go up there and turn on a light and leave it on for about 30 minutes before you go in to do your work. Spider bites are dangerous and can have permanent and highly negative consequences. This type of spider bite cannot be allowed to go without medical attention. In fact, it could be fatal if not properly treated.