The Denali TriOptic ‘Selective Yellow’ lens kit for D3 Fog lights are designed to maximize visibility in foggy and rainy conditions. The ‘Selective Yellow’ color of the lens increases visibility in fog and rain by blocking blue frequencies which reflect off water vapor and decrease vision. This ‘Selective Yellow’ lens kit also provides for even more daytime visibility to oncoming traffic. Fitment Note: This D3 TriOptic lens kit is only compatible with the D3 TriOptic Fog (Spread) lights and is not compatible with the D3 Driving (Spot) lights.