Servo control Led switching, all hidden in a small model ship and connected to a raspberry pi3

I have been building model ships at the scale where I have been using the Maestro modules to control y turrets, usually 6, and I am looking for any ideas on how to also control the leds that I use in the bridge, decks, etc etc… all along the usb cabel to my raspberry Pi…

So far i have been using the Pi to control the turrets but needing switches for the lights, i was trying to have it all controlled by the Pi, is there such a module that runs from a USB that switches on and off led.s

Use RGB LEDs. You connect them in series and will be able to make individually any colour and brightness. You can also control them from the Pi.

These are very small. I hope your soldering of small devices is good: