A phototherapy device includes a shell having an outer side, and an opposing inner side configured to face a treatment surface a plurality of emitters of electromagnetic radiation that are supported by the shell and arranged to illuminate the treatment surface with the electromagnetic radiation a holder that is connected to the shell as well as a spacer having a head configured to adjustably connect to the holder, and a leg extending from the head and configured to abut the treatment surface for supporting the phototherapy device at an adjustable distance from the treatment surface.