Light Eating (光を食べて Hikari wo Tabete) is a technique used by Yakon.
Yakon gathers all his momentum and begins to suck the very energy of his opponent through the air and consumes the potential aura. The opponent is drained of their light energy and aura in the process, and is weakened due to this technique.
Yakon uses his light consumption technique against Super Saiyan Goku. He drains the Saiyan dry until Goku emits greater light, to the extent where Yakon's light eating backfires and forces him to explode from the over-consumption of light. Aside from the drawback of consuming too much at once, it is a very dangerous maneuver as it can drain the opponent of their light aura and incapacitate the primary source of their strength.