The utility model discloses an aquarium lighting device for providing illumination for a water body, a system and a suite. The aquarium lighting device comprises a closed shell and a luminous module, wherein the closed shell is provided with an air inlet for introducing air from an air pump into the shell and an air outlet for discharging the air out of the shell the luminous module is used for providing illumination for the water body in the shell the air pump conveys the air into the closed shell of the lighting device to enable the luminous module to keep at working temperature, and the closed shell prevents water from entering the shell and prevents the luminous module from exposing in the water. The system comprises the lighting device and an air pump device, wherein the air pump device is communicated with the air inlet of the aquarium lighting device through a fluid, and is used for conveying the air into the closed shell.
