Only the airspace at or below 3000' AGL is restricted. Go look at a current JAX sectional to read the notation.
If that light is there it's because it's mandated to be there, not to serve as a navaid. One red blinking light looks pretty much like any other one from the air be it on top of a wand, an antenna or Rudolph's nose.
If that light is there it's because it's mandated to be there, not to serve as a navaid. One red blinking light looks pretty much like any other one from the air be it on top of a wand, an antenna or Rudolph's nose.