The invention discloses a circular aquarium lamp that comprises of a lamp body and a lamp bracket, wherein the bracket is connected with the body through a universal ball head. The body includes an upper and lower shell, an LED lamp panel and a heat-dissipating aluminum. The upper and lower shells are connected by a screw. The LED lamp panel and heat-dissipating aluminum are installed separately in a cavity that is formed between the upper and lower shell. The LED lamp panel is located under the heat-dissipating aluminum with a fan on top. A first rubber ring is set in between the LED lamp panel and a water-proof cover, whereas a second rubber ring is set in between the cover and a glass sheet. A control board is contained inside a circuit board shell which is installed in the lower shell.;The radiator of this circular aquarium lamp has adopted a strong convective heat-dissipating design, thereby increasing greatly the cooling effects. Its fan will be turned on automatically when the temperature is relatively
