Bandak is a lake in the municipalities of Kviteseid and Tokke in Telemark county, Norway. The lake, which is part of the Telemark Canal route, belongs to the Skien watershed. The river Tokke flows into the lake, and the outlet is via the river Straumane, to Kviteseidvatn.The Tokke Hydroelectric Power Station utilizes the hydraulic head from Lake Vinje to Lake Bandak of ~394 meters to generate electricity.