Light conversion systems, methods, and devices

A sanitization system, comprising:

• a passenger service unit including a light assembly, the light assembly comprising:
• a first light emitting diode (LED) configured to emit a first electromagnetic radiation having a first wavelength toward a seat in a row of a cabin of an aircraft;
• a second LED configured to emit a second electromagnetic radiation having a second wavelength toward the seat in the row of the cabin of the aircraft, the second wavelength being different from the first wavelength;
• a third LED configured to emit a third electromagnetic radiation having a third wavelength toward the seat in the row of the cabin of the aircraft, the third wavelength being between 414 nanometers (nm) and 474 nm, the first wavelength and the second wavelength different from the third wavelength;
• and
• a nonlinear optical layer, the nonlinear optical layer in optical communication with the third LED, the nonlinear optical layer configured to receive the third electromagnetic radiation from the third LED and output a portion of the third electromagnetic radiation as a fourth wavelength toward the seat in the row of the cabin of the aircraft, the fourth wavelength being between 207 nm and 237 nm, the fourth wavelength being different from the first wavelength, the second wavelength, and the third wavelength.