@farmerman,
farmerman :
the NEUWERK lighthouse was originally a "watch-tower" to keep an eye on the pirates raiding ships entering and leaving the ELBE river .
the first `light`was an open fire in a `fire-basket`.
it is now operated as a B & B !!! can`t find info on the original lenses .
the ship traffic is now monitored by computerized beacons , i understand -
walter would know better .