Abstract: In an example embodiment, the controller is designed with a single current sensing circuit that is able to measure the current on multiple LED channels, eliminating the need for each LED channel to have its own current sensing circuit. The current sensing circuit may further be utilized with a control unit, which has an LED control model selection multiplexor (MUX) that switches between real-time closed-loop control and open-loop control.

Abstract: A feature inspection lighting system includes an outer cover having a mounting structure at a first end thereof and defining an outer periphery at a second end thereof. The cover includes an inner surface between the first end and the second end. The inner surface has raised surfaces defined thereon. A plurality of light sources is coupled to the raised surfaces of the inner surface of the cover, and cables to provide electrical power to the light sources is routed between the raised surfaces of the outer cover. The outer periphery of the cover may have a cutout defined therein through which all or part of an object to be inspected can pass.