UV LEDs with White Housing: The device might be a UV light (emitting ultraviolet radiation) housed in a white-colored unit. The 18 LEDs likely generate UV light for specialized purposes.

Dual Function (UV + White LEDs): It could combine UV and white LEDs, offering both UV functionality (e.g., disinfection) and visible white light for illumination.

Mislabeling or Misunderstanding: "White" might refer to color temperature or casing, not the emitted light. True UV light is invisible (though some UV-A LEDs emit a faint purple glow).

Disinfection: If UV-C (270–280 nm), it could sterilize surfaces, air, or water. Common in hospitals, labs, or home use (ensure safety; UV-C harms eyes/skin).

Curing & Industrial Use: UV-A (315–400 nm) cures resins, inks, or adhesives in nail salons, 3D printing, or manufacturing.

Fluorescence Detection: UV-A lights reveal stains, counterfeit bills, or forensic evidence.

Special Effects: UV-A creates glow-in-the-dark effects in entertainment or decor.

Wavelength Matters:

• UV-A (315–400 nm): Safe for limited human exposure, used in black lights.

• UV-B (280–315 nm): Used in medical therapy (e.g., psoriasis treatment).

• UV-C (100–280 nm): Germicidal but hazardous; requires precautions (e.g., timers, no direct exposure).

Power & Coverage: 18 LEDs suggest moderate output. Coverage depends on wattage (e.g., 1W per LED = 18W total). A "big" light likely targets large areas (e.g., rooms, surfaces).