Abstract: A self-contained solar powered floating apparatus stores energy during the day and uses the stored energy to emit light underwater during the night, thereby attracting fish to the vicinity of the apparatus. The fishing bobber apparatus includes a floatable housing, a photovoltaic module disposed within the housing and including photovoltaic cells to receive solar radiation and convert the solar radiation into DC electricity. An energy storage module is electrically coupled to receive and store the DC electricity from the photovoltaic module during a storage mode, and a light emitting module is electrically coupled to receive DC electricity discharged from the energy storage module during a discharge mode and convert the DC electricity into light that is emitted through a portion of the housing. A light sensing module and associated control circuitry detects the presence of ambient light.