A lamp for use under water having an electrical multicolor light source, electrical connections for the power supply of the electrical multicolor light source, a controller configured to control the light color emitted by the electrical multicolor light source, and a housing, wherein the housing is translucent at least in sections and defines a water tight closable hollow space, wherein the electrical multicolor light source and the electrical connections are arranged within the hollow space, wherein the housing forms a mechanical shell surrounding the hollow space, the mechanical shell having a double curvature at each point of the shell； and a use of the lamp as a light bait when fishing.
