This is an industrial style tower signal light for IoT applications. Mine has two sections: one with a red LED and one with a green LED. It can have as many sections as you want.
In the base there is room for a WeMos D1 mini (ESP8266 MCU) that can drive the LED's. The system is powered via USB (USB hooks directly into the D1 mini).
The 2 (or more) parts that hold the LED's should be printed using a transparant (neutral) colour.
Base_v2.stl: better base (somewhat tighter fit).
Print the parts using supports. I sliced them with Slic3r. Print the file
Lighthouse-Print_2x.stl twice with a transparant filament.