Tracked grid light with two axes of intelligent locomotion

A self-propelled light unit comprising:

• a carrier configured for movable displacement on a support structure;
• a first conveyor assembly operable to move the carrier on the support structure along a first axis of movement;
• a second conveyor assembly operable to move the carrier on the support structure along a second axis of movement transverse to the first axis of movement;
• a light source configured for attachment to the carrier in an operable mode to provide illumination to an area in proximity to the carrier;
• and
• at least one power contact configured to maintain electrical contact between the carrier and the support structure,
• the first conveyor assembly comprising a first conveyor linearly arranged along a first conveyor path, and a second conveyor linearly arranged along a second conveyor path, the first conveyor path and the second conveyor path extending parallel to one another and to the first axis of movement;
• the second conveyor assembly comprising a third conveyor linearly arranged along a third conveyor path, and a fourth conveyor linearly arranged along a fourth conveyor path, the third conveyor path and the fourth conveyor path extending parallel to one another and to the second axis of movement;
• each of the first conveyor, second conveyor, third conveyor and fourth conveyor comprising a gear assembly configured for operable engagement with a rack that extends along the support structure;
• each gear assembly comprising a plurality of gears extending in parallel and configured for operable engagement with the support structure;
• the first gear assembly and second gear assembly each comprising a plurality of gears having a gear path parallel to the first axis of movement;
• and
• the third gear assembly and fourth gear assembly each comprising a plurality of gears having a gear path parallel to the second axis of movement, wherein
• the carrier comprises four sides;
• each side extends alongside of only one of the plurality of gears having a gear path parallel to one of the first axis of movement and the second axis of movement;
• and
• each side extends alongside of only two of the plurality of gears having a gear path parallel to the other of the first axis of movement and the second axis of movement.