Thank you 
Very simple approach.
I placed an empty in the center of the beacon.
Then parented the beacon to the empty.
Place a small area light insight the beacon housing (?). And play around with the size and strength.
And parented the area light to the empty.
Because I don’t know yet(!) how make the beacon material behave like glass, I assigned a few faces a new material slot with an emission shader.
In the animation tab, have the empty spin 360 deg in 13 frames.
To “auto-repeat” the rotation, set the extrapolation mode to Linear extrapolation.
That’s it.
I used the same approach to have the fan spin too.
Hope this helps.
Cheers,
Ray