A connection to an electrical supply for a lighting system can be configured to facilitate deployment of the lighting system in a cramped space, for example in a shallow overhead plenum. The lighting system can comprise a housing for the light source. One or more sides of the housing can extend about the light source, for example circumferentially around the light source or otherwise laterally enclosing the light source. The electrical connection can be provided at a side of the housing, resulting in a low profile.