Exterior decorative lighting

An aircraft comprising a system for illuminating a winglet cap of a winglet, the aircraft comprising:

• the aircraft;
• the winglet coupled to a wing of the aircraft:
• the winglet cap positioned on a leading edge of the winglet;
• a light source disposed within the winglet:
• a total internal reflection (TIR) lens positioned in proximity to the light source;
• a prismatic lens positioned between the light source and the winglet cap;
• a controller;
• and
• a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising:
• controlling the light source to generate a first light, wherein the first light produced by the light source reflects off of a surface of the TIR lens and passes through the prismatic lens, wherein the prismatic lens bends the first light and directs the first light toward an inside surface of the winglet cap, and wherein the light source and the prismatic lens are coupled to support structures that allow the light source and/or the prismatic lens to translate so as to either increase or decrease a mating distance between the light source and/or the prismatic lens and the inside surface of the winglet cap.