Fountain lights under water are generally divided into ordinary incandescent lamp and high-pressure gas discharge lamp two. The color of an ordinary incandescent lantern is determined by the color of the exterior guard glass, whereas the color of the high-pressure discharge lamp is caused by a high pressure current triggering the inert gas in the bulb. Here only two incandescent lantern types: R and PAR, indicating their structure.

The lantern is generally installed in the pool, the top of the lamp is about 30~100mm from the water surface, and the power cord of the lantern is a three core rubber sheath line, one of which is used for earthing. Other wiring devices are junction boxes, iron pipes, etc.. In addition, the lantern can also be installed on the land around the fountain, so that the light is shining on the fountain. At this time, as long as the use of ordinary lantern, to reduce the cost of the project and the cost of the fountain.
At present, the domestic production of sealed lamps rated voltage below 36V and 220V two. General fountain with 220V lantern, power 50~300W, R type bulb in the neck sealed, loaded into the lamp, directly immersed in water. The utility model has the advantages of simple structure and low cost. The disadvantage of the bulb is that the reflecting and concentrating performance is not good, and the outer shell is glass and is easy to be broken. Its service life is 500~1000h.

Model PAR is a closed bulb. The bulb consists of a glass reflector and a glass surface. The reflector can be made very accurately, and when the material is coated, the condenser has good light collecting performance. Various types of prisms can be suppressed on the protective glass surface. The light emitted by the light source is reflected by the reflector and then reaches the prism to be distributed again, so that the intensity of the light meets the requirements of different fountain types. Type PAR light bulbs are colorless and are contained in the lamp housing. The lamp housing is composed of a metal frame and an outer housing. The outer cover is made of heat-resistant glass of different colors. Heat resistant glass and the shell is sealed by a rubber ring. The colors of glass are red, yellow, green, blue and transparent. Five, yellow and transparent glass have the best light transmission. The light bulb has two kinds of narrow beam and wide beam, which are selected according to the flower shape of the fountain. The advantages of this lamp is the color glass by pressing, high mechanical strength, easy breakage and reliable sealing; in addition the projection lamp can adjust the angle in the horizontal direction, can make a 360 DEG rotary, the vertical direction can rotate in 180 degrees up and down.

In some special scenes, the musical fountain has unique artistic effects, and is gradually being used by people. The general music fountain works with sound control principle. The musical fountain device is composed of a sensor, a controller and an executor. The sensor will change into the audio signal, transmitted to the controller; controller is installed in the open and close the nozzle inlet tube actuator on a solenoid valve, so that the water jet nozzle and the change range, content and direction of the jet with the audio change.