I have 10 bulbs that are like these: https://www.1000bulbs.com/product/63652/IND-0053-10PK.html (14v incandescent). They are in a hardware display that was created for other purposes. They light just fine if I connect a 9v battery, so perhaps they don't actually need the 14v.
I need to control them from the RPi GPIO.
Only 1 bulb ever needs to be on at any given time.
I would just use 10 GPIO pins, but the Pi only puts out the 3.3v, and so the bulbs just don't light.
Replacing these with a bright-enough LED might work, but the bases are already installed, and the hardware is nice, so I'd rather just use the existing wires and put something together.
I'm relatively new to electronics, so I'm not sure what I would use (some kind of external power supply?) or how to control the lights independently.