... the red navigation light is only on the tip of the "generator" box in the middle of the rotor, but the unlit blades soar some 40- 60 plus feet higher which strikes me as how can they do that?
CAP637 Visual Aids Handbook states:
"An aerodrome obstacle is one that is located on an area intended for the surface movement of an aircraft or that extends above a defined surface intended to protect aircraft in flight or exceeds 150 m height above ground, within a radius of up to 15 km of the aerodrome.
Fixed obstacles of 45 m or less in height, width and length are normally lit by a single steady redlight placed at the highest practicable point; those obstacles of greater size are normally provided with additional red lights in order to outline the extent of the obstruction.
Objects located beyond the vicinity of an aerodrome are considered to be obstacles to aircraft in flight if they exceed 150 m in height. However, prominent objects of lesser height may also be regarded as obstacles where, for example, they are located on or adjacent to routes regularly used by helicopters or low flying (military) aircraft.
En-route obstacles are normally lit by steady red lights at night and, in exceptional circumstances, by high intensity flashing lights."
CAP764 CAA Policy and Guidelines on Wind Turbines would be worth reading. It would be interesting to assess the effect of the turbulence caused by the turbine blades.