Material is high quality plastic, so strong it must be to be form holding and giving a beautiful diffused light, but as little material as they can, thus saving resources. Depends with me on the ceiling hopefully for many years because the "feel" does not matter, but the look just fine! With me were the 3 cable terminals clearly labeled (N, L earth). Growing problems, light Top brightness and tint is also very good, can with normal lamps without showing color cast as cheap LEDs, are prima combined.
