Selective Yellow Light

Selective Yellow Lighting is meant to improve vision by removing shorter, blue wavelengths from the glowing filament in your headlamps. The blue wavelengths are more difficult for the human visual system to process properly as they can dazzle and glare intrusion during rain, fog and snow.... This dazzle and glare can be reduced significantly through the use of Selective Yellow Fog Lamps or Lights.

Daniel Stern explains it all in his highly popular website article: ... What is "selective yellow" light?