The Gemini Agena Target Vehicle was an uncrewed docking target utilized during the Gemini program. Although uncrewed itself, it had an externally mounted lighted display panel that could be viewed by the crew in the docked capsule.
Source http://www.astronautix.com/g/geminiagenatargetvehicle.html
Image source How Stuff Works - docking adapter is at the right.
The vehicle also had 'acquisition' and 'approach' lights to aid in the rendezvous and docking.
ACQUISITION LIGHTS
The acquisition lights (Figure Above) are used for visual guidance and tracking of the target vehicle when the vehicles are 20 nautical miles or less apart. Two lights are provided. They are mounted on the docking adapter and are held in the retracted position during the boost and insertion phases of a mission. The docking cone holds the lights in the retracted position until the cone is unrigidizedby the pilots via the Command Link.
Each light consists of a capacitor discharge flashing light system. The lamp flashes at a rate of 65 flashes per minute and has a minimum of 100 candles effective intensity through an included angle of +/- 90 degrees from the lamp longitudinal axis. A reflector increases the intensity so that the lamp is visible from 20 nautical miles with the intensity of a third magnitude star. The pilots turn the lights off and on via the Command Link.
APPROACH LIGHTS
Two approach lights are mounted on the docking adapter (Figure Above). They are positioned so that they shine through the rear opening in the cone to illuminate the notch during final approach of the spacecraft to the target docking vehicle. Some light, however, reaches the entire inner surface of the cone. The pilots turn the lights off and on by using the cone. Electric power is supplied by the target vehicle power system.
Source: http://www.geminiguide.info/Systems/Target.html (annotations mine)
First launch of this vehicle on a mission that achieved a docking was March 16, 1966.
Source: https://www.nasa.gov/feature/geminis-first-docking-turns-to-wild-ride-in-orbit
Confirmation by DrSheldon:
The acquisition lights were extremely bright, flashing beacons that could be seen up to 20 nautical miles away. Apollo Experience Report: Lighting Considerations, NASA Tech Note D-7290, states Apollo used lights derived from the Gemini Agena Target Vehicle, and that they were xenon lights (and therefore not incandescent):
External lighting (figs. 11 and 12) was used for detection, illumination, and attitude orientation. All of the lighting aids had been proved successful for rendezvous and docking during the Gemini Program.
Both the LM and CM were equipped with a flashing xenon light. [...] At 60 nautical miles, the light is equivalent in brightness to
a third-magnitude star. It could be detected with optical aids at 160 nautical miles. This light was a modification of the light used on the Gemini Agena Target Vehicle.
The approach lights seem to be the Gemini equivalent of the Apollo running lights. D-7290 states "The light fixtures consisted of five grain-of-wheat lamps enclosed within a lensed housing", which would make them incandescent.
The display panel is described in Project Gemini: A Technical Summary, NASA CR-1106, pp. 332-333. This document explains the color and meaning of each light and indicator on the Agena Target Vehicle. Unfortunately, it does not mention what type of bulb is used. However, several Gemini astronauts complained that the display was not bright enough to be seen in direct sunlight. This strongly suggests that the lights were incandescent.
So the GATV was uncrewed, and had incandescent lights.
