There are two flavours.

    1. Arms are connected directly to the ceiling rose.
    2. Arms are connected to a sphere which is connected to the rose via a thickn stem.

The former is useful for low ceilings.

Naming :

    Rose : The visible part nearest to the ceiling.
        Piece `rose` has arms connected directly to it.
        Piece `stemRose` uses a stem and a ball, and the arms are connected to the ball.

    Rose Fixture :  Screwed to the ceiling (hidden by the rose)
    Pin : 3 tiny pieces to join the rose to the roseFixture.

    Ball : )Optional) When the Arms are not connected directly to the Rose
    Stem : A rod from the Rose to the Ball
    Arm : A rod from the Ball or Rose to the light fitting.
    Arm End : Screws into the the Arm