The 28s is a surface-mounted light that is designed to be composed in atmospheric groupings.
2.2" / 55mm diameter mounting plate designed to be mounted on walls and ceilings, with power supplies mounted remotely.
4.5" / 115 mm diameter mounting plate designed to be mounted directly onto standard junction boxes on walls and ceilings.
3" / 75mm diameter mounting plate designed to be mounted directly onto standard junction boxes on walls.