This is a hanger system for LED bar lights. These lights are available, usually as 4' long lights that looks similar to fluorescent tubes. The hanger allows the light to be mounted pointed up, giving a softer light effect by indirect lighting off the ceiling.
The hangers were printed in clear to give an interesting light effect. The design is very thin to maximize the transparency. The LED lights are very light, so the structure is strong enough in the vertical direction.