There is provided a light generating unit including a transparent vessel that is elongated and contains water and a light-emitting/bubble producing unit that is attached to a base plate of the vessel. The light-emitting/bubble producing unit includes a plurality of LEDs arranged around inner surfaces of side walls of the vessel and a plurality of nozzles for discharging gas that are disposed on an inside of the plurality of LEDs. Also provided is a display apparatus in which a plurality of the light generating units are arranged with the vessels adjacent to one another so as to construct a light generating block in the shape of a wall and which is capable of displaying images and/or information by way of bubbles and illumination light.