Reflectors come in two main categories:

1. Safety Reflectors:

These are devices designed to improve visibility in low-light conditions, primarily for safety purposes. They are commonly found on:

Vehicles: Reflectors are mandatory on most bicycles, trailers, motorcycles, and even some cars (especially larger vehicles) to increase their visibility to other drivers at night. They come in various shapes and sizes, often red for the back and white or amber for the front and sides.
Pedestrians and Runners: Reflective clothing with embedded reflectors or clip-on reflectors are worn by pedestrians, runners, and cyclists to enhance their visibility to drivers, especially during nighttime hours.

2. Photography Reflectors:

Reflectors