Glow G-String is one of the best glow in the dark yo-yo strings available! It glows great and plays even better!
http://yoyoexpert.com/blog/wp-content/uploads/2014/12/g-string-glow-yoyo-string.png http://yoyoexpert.com/blog/wp-content/uploads/2014/12/g-string-glow-yoyo-string1.png
http://shop.yoyoexpert.com/product/791/G-String---Glow-(5-Pack)