These LED Contact Balls are super bright and are great for stage/street performing, tripping people out , outdoor music festival, DJ shows,etc . Or, if parties and performances aren't your thing, use the LED Contact Balls for night-time lawn-bowling, or simply as a colorful and creative way to light up your patio or deck for those summer get-togethers. The LED Contact Balls are available in a 76mm. solid polypro. hard plastic with a smooth, weighty feel.