The CFTech LED Ultimate Frisbee is very bright at night. It does not bend and is 9.8" in diameter. It has multicolors with the LED lights. The frisbee is very durable and lightweight and water resistant. The frisbee LED lights last for 16 hours on a charge and has 2 CR2016 coin cell batteries. The frisbee can be used both night and day. I used the frisbee at night and it was very bright and flew straight and swifgtly. I recommend the CFTech Ultimate Frisbee. #RankBoosterReview ii, Sponsored iii #CFTech Ultimate Frisbee https://www.amazon.com/gp/product/B01MQLW8OI/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1