Scarecrow has released these new ultra glow in the dark fangs! The caps are made of a special material that takes power from regular light to charge up the caps. HINT: These ROCK under a blacklight! The glow is SO BRIGHT! These caps are specially designed to look as natural as possible during the day! Don't be fooled by cheaper items that may look totally green during the day! Only Scarecrow fangs can bring you ultra realism at an affordable price!