Ambient Lighting Pendants:
Ambient Lighting pendants are designed to put out light in all directions and will generally have either no shade or use a partially or completely translucent shade made of glass or other material.
Down Lighting Pendants:
Down Lighting pendants are designed to splay most, if not all, of the light downwards. Use of these pendants will sometimes meet Dark Sky rating standards.
Up / Down Lighting Pendants:
Up / Down lighting pendants are different from ambient as most of them are designed to splay lights in up and down directions however, in most cases, not to the sides.
Up Lighting Pendants:
Up Lighting pendants are pendants that are designed to splay light above the fixture and work well for pendants that are hung below light colored ceilings.