an adjustable fluid - driven illumination device . at least one light - emitting element is connected to a nozzle . a grip is connected to the nozzle . a turbine generator moves between the nozzle and the grip and is electrically connected to the light - emitting element . the turbine generator includes at least one rotating blade . when moving into the nozzle to enable the rotating blade to rotate by impact of a fluid flowing through the nozzle , the turbine generator generates electric power , driving the light - emitting element to irradiate . when the turbine generator moves into the grip , the rotating blade is not subjected to the impact of the fluid flowing through the nozzle , stopping the turbine generator from generating the electric power .