The 57s is a surface-mounted dark grey or white opaline glass that houses 1.5-watt LED lamp.
2.2" / 55mm diameter mounting plate designed to be mounted on walls and ceilings, with drivers 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.