D'Addario puts a new twist on celluloid picks with Cellu-Glo glow-in-the-dark picks. Cellu-Glo picks offer the natural feel and warm, fat tone of traditional celluloid picks in a fun and convenient glow-in-the-dark format that makes them easy to find in dark stages or studios. Simply pre-charge the picks in natural sunlight or under a light bulb and let Cellu-Glo picks add a new visual element to your playing.