The Hubstack Afterglow from YoYoFactory is an awesome glow yo yo fitted with hubstack bearings on each side.
The LEDs in this glow yoyo are very bright. Even in the daytime the LEDs are highly visible but it's at night or in other darker environments that the Hubstack Afterglow really comes alive. The LEDs light up when the yoyo starts spinning and turn off when it stops. The yoyo will continue to glow thanks to the luminous plastic that makes up part of the body.
The hubstacks fitted to this yoyo open up a whole range of tricks not possible with other yoyos. You don't even need to throw the Hubstack Afterglow to get it spinning - just hold the hubstacks and pull the string!
The Hubstack Afterglow has a relatively mild flared gap shape and a ball bearing axle. It is set up to be unresponsive so it requires a bind trick to return it to your hand so it's not suitable for beginners. If you want an LED yoyo that is better for beginners, have a look over here.
See it in action here: