TriOptic™ Lens Kit for D4 LED Lights - Amber or Selective YellowTriOptic Lens Kit for D4 LED Lights Amber or Selective Yellow This TriOptic Lens Kit for D4 lights is designed to maximize visibility in foggy and rainy conditions. Both Amber and Selective Yellow lens colors increases visibility in fog and rain by blocking blue frequencies from the light, which reflect off water vapor and decrease vision. Choose Amber to match your OEM turn signals, or Selective Yellow for even more daytime visibility to oncoming