The Sundrop Tungsten Jigs are made with luminous materials which absorb and store light energy from direct sunlight or an artificial light source. Then emit a brilliant glow. This bright glow attracts fish and sends them into a 'feeding frenzy'. Tungsten jigs are sharper, drop faster and last longer. Available in brilliant colors that attract fish day or night-even in stained or muddy water. For BEST results, use camera flash or LED to excite the jig, then tip with your favorite live or artificial bait.