In the aquarium led light circuit, strings of LEDs are connected to the collector of switching transistors T1 through T3. When the IC triggers, oscillations starts and the output Q6 turns on after 5 ...

The LED light bars can produce colored light from a palette of 16 million colors, or you can choose a tunable white light (ranging from a very warm 2,000 Kelvin to a cool 7,000K).