That hideous strength. The cobalt glow of spent fuel rods at the bottom of a heavy-water storage pool. The phosphorescence of rotting flesh. The bioluminescence of fireflies and anglerfish and the chilling crackle of St. Elmo's fire. The Sacred Heart. Light from within strikes fear, awe and curiosity. Nail polish speaks of danger. The semiotics of Halloween prostheses devolves to queasy, tingling-gut humor, too gross to gross you out, too nauseating not to laugh in delight. These simple, cheap silicone dainties are fitted to a child's hand, and give a good hard glow when charged up under a light.