subdermal LED cascade necklace, (internal LED glow:1.7), (embedded LEDs:1.7) forming a cascading, layered pattern of glowing light beneath the skin, (delicate light strands:1.7) flowing down from the collarbone, mimicking the elegance of a waterfall necklace, soft light radiating from the top downwards, (layered light effect:1.6), high-definition, (natural skin tone:1.5), (ultra-realistic skin textures:1.8), smooth, graceful transitions of light following the neck’s natural contours, (no visible jewelry:1.8), (chains:-1.8), (rigid design:-1.5), glowing cascade effect under the skin, timeless, elegant, and perfect for formal occasions