A lighting fixture includes a bus printed circuit board that receives power from an external source. The bus printed circuit board has traces that route the power to a set of exposed pads, and also has mechanical features for receiving an electronic device. The lighting fixture further includes a set of one or more drivers, having mechanical features for engaging the mechanical features of the bus printed circuit board to mechanically mount the driver to the bus printed circuit board. Each of the set of one or more drivers further includes a set of spring contacts positioned to engage at least some of the exposed pads of the bus printed circuit board when the driver is mounted to the bus printed circuit board, to supply power to the driver. The lighting fixture further includes one or more light sources driven by the one or more drivers.