GlowCity LED Light Up Tetherball-Uses Hi Bright LED Light-Better Than Glow in The Dark GlowCitys Official Size LED Light Up Tetherball: We replaced that flimsy rope that normally comes with these balls with a strong clip and nylon rope! This tetherball is made for hours and hours of play with easily replaceable batteries. IMPACT ACTIVATED: Our tetherballs have characteristics unlike any other on the market. Far from a glow in the tetherball , where you wait for it to charge under light our smart LED bulbs are instant! SUPER BRIGHT: Powered by a Hi Bright LED! Especially at night our tetherball displays a magnificent Glow. There is an intensity to the bright LED that is remarkable! DURABLE QUALITY: Our LED Tetherball is made to be used like all our other products. Our rubber grommets protect the LEDs to make the tetherball fully water resistant. FIRST CLASS CUSTOMER SERVICE: GlowCity strives to provide the best customer service to our customers. We provide a 60-day repair/replace guarantee on all our products.