Huh. TIL what a "bug repellent fan" is:
>INSECTS AVOID THE REFLECTIVE PATTERN – Bugs avoid this fan and will refuse to fly anywhere near it. The holographic pattern on the blades bend the light (refraction) while spinning, creating an unnatural environment that insects fly away from.
>IT WORKS: The fan blades feature a reflective pattern that while in rotation, will refract or bend light, disorienting airborne insects. They see this disruption in light as a danger, and as such, will keep away from you and your food & beverages.