Novel protein useful as a selectable marker resistant to the antibiotic nourseothricin and corresponding polynucleotides for insertion of genes and other genetic material into a variety of organisms, including plants are described. While this arrangement may be used in a general way for various tasks, it has particularly beneficial application for tethered physical exercise activities. In other illustrative embodiments, the light apparatus may be used to provide illumination for other objects or equipment including, for example, docks, retail andor store shelving andor equipment, bars, desks, counters, walls, railings, steps, andor any other object or surface, as desired.