Human Beings Were Led to This Light is a fan album based on two popular anime series from 2012, Accel World and Sword Art Online, released by two doujin circles, Allium Project and Compllege. Most of the tracks are sung by Yuzuki Yukari, but IA and Aoki Lapis are also featured on the album.
The album was released at Comiket 82.
The official site can be found here.
It can be ordered through toranoana.