A light output device comprises a power supply and a plurality of light source device arrangements arranged in a line extending from a power connection, with adjacent light source device arrangements in the line connected together with an electrical connector arrangement. Each light source device arrangement is associated with a control circuit from the plurality of control circuits for providing independent control of the light source device arrangement output based on the control signal. The device can be reduced in length by disconnecting the connector arrangement between an adjacent pair of light source device arrangements and the remaining light source device arrangements extending from the power source are independently controlled by the control signal.