The idea of a RGBW lamp for aquariums stems from the idea of having an open-source lamp, which has the characteristics of being highly feature-rich due to its open-source hardware and software but at the same time easily repairable or interchangeable due to its modularity at very low cost. The lamp can be controlled via Bluetooth via your smartphone and allows you to manage the light intensity separately, so that you can have the lighting effect you like best and bring out the colours of the aquarium. In addition, you can set on and off times for the lamp with fading time to simulate sunrise and sunset. Finally, it is possible to monitor the aquarium water temperature via sensor.

For more details please visit:

GitHub: https://github.com/savergiggio/Smart-Modular-RGBW-Aquarium-Lamp/

Instructables: https://www.instructables.com/Smart-Modular-RGBW-Aquarium-Lamp-With-Cloud-Remote/