... LED fiber optic light shoe, is optical fiber, and better quality than the EL luminescent shoelace, glow shoelace ... shoe, is optical fiber, the quality is better than the EL luminescent shoelace pull ,30-50KG ... . Metering principles:Because fiber optic light guide, it will receive the impact of ambient light, the ... optic light guide, when the fiber twists and turns, it can reflect more light, This can be ...