A modular light system comprising a lightbar assembly with first and second conductive parts, each of which extend in a direction generally transverse to a longitudinal axis of the lightbar assembly. The modular lightbar system further comprises a lightbar assembly connector having a major surface and with a conductive part that extends in a direction generally transverse to the major surface. Such a design and configuration enables the lightbar assembly connector and lightbar assembly to be connected by moving the lightbar assembly connector in a direction generally transverse to the longitudinal axis of the lightbar assembly (or by moving the lightbar assembly in a direction generally transverse to the major surface of the lightbar assembly connector). It is thus possible to assemble a lightbar system comprised of a plurality of lightbar assemblies and lightbar assembly connectors, any of which are removable, replaceable, or serviceable.