Disclosed herein are particulate coating compositions comprising a powdered carrier and a pearlescent pigment. The method comprises acquiring a white-light image and an ultraviolet image of at least a portion of a body surface, such as a person’s face, each of the white-light and UV images including a plurality of pixels and each pixel in the UV image corresponding to a respective pixel in the white-light image. The first contact element is slideable past the second contact element to form a scissor-like jaw. The subcircuit selection is responsive to the determined respective indicia of power consumption by the first subcircuit and by the second subcircuit.