The ornamental design for a ring and cubehead electric light fixture suitable for a tracklightingsystem, as shown and described.
FIG. 1 is a front perspective view of the light fixture.
FIG. 2 is a top view of the light fixture.
FIG. 3 is a side view of the light fixture, the left and right side views of the light fixture being mirror images of one another; and,
FIG. 4 is a front view of the light fixture, also showing a light bulb socket indicated in phantom and not claimed as a part of the ornamental design but included to show a functional part which may vary in appearance according to the type of light bulb expected to be inserted into the light fixture. The broken line showing of the light bulb socket is for illustrative purposes only and forms no part of the claimed design.