FLUORESCENT COLORED TAPES -  These UV fluorescent (also known as "Neon") colored tapes, are vivid, attention getting colors.  They are available in a variety of materials, some of which fluoresce (glow) brightly under "black light" (ultra-violet light) in a dark room.  Fluorescent tapes are listed below in order of relative reactivity to black light (UV light), brightest listed first.  CAUTION: Never look or stare directly at a UV or black light!