A method and system for detecting lead adequacy and quality for leads used in devices that sense or deliver low levels of electromagnetic energy. The system includes leads attached to a package substrate having known electrical or optical characteristics. The package is adapted to interface with a testing device that allows an operator to ascertain whether the leads are appropriate for a desired task. The operator need not remove the leads from the package to perform the test. The lead testing system may be freestanding or integrated into a lead utilizing instrument.