Hi ToraDog, I didn't think of a gear on the rotating shaft, thanks. I'm using it on a 1/20 boat but the light also comes in my 1/32 tug boat that I have yet to start building

Hi Westwind,
What a beauty!
The outer shaft rotates the light. I would glue a gear wheel, toothed or belt driven, to it. Put it's mate on a servo, something like a GoBilda 320 degree rotation servo. Then you need to raise and lower the inner shaft to elevate the light. Turn a servo on it's side. You could use a spring return system and a cam, a direct linkage, there are so many ways to do it and everyone has their way.
BTY, what scale is that light? Thanks
Jonathan