LED lights in Semaphore signals Help

I am about to convert my collection of MSE semaphore signals to working LED lights and want some help with what sort of power supply do I require. All the LEDs are 1.8 mm and will number about 30. So what voltage is required to power them and what of the requirements to wiring, can they be wired as one for example?
I have a gantry that will require 14 lamps for example so what of that as well.
Thank you for any advice.