Light source including an array of light emitting semiconductor devices and control method

A light source comprising:

• a substrate;
• an array of un-packaged light emitting semiconductor devices (LESDs), each of the LESDs having at least one surface for emitting light and a substrate surface being attached to the substrate;
• and
• a plurality of electrical connections, each electrical connection coupled for providing electrical power to a respective LESD, each electrical connection including metallization patterned over a portion of at least one side surface of a respective LESD, wherein the substrate surface of each LESD includes at least one substrate surface contact pad and the substrate includes substrate contact pads, wherein the metallization extends to couple the at least one light-emitting surface and the at least one substrate surface contact pad, and wherein the at least one substrate surface contact pad is aligned with a respective one of at least one of the substrate contact pads,
• wherein the LESDs are arranged on the substrate with sufficient density and light generating capability to provide a predetermined irradiation from the light source.