The construction
of the tower is identical with two other towers in North Friesland,
the Westerheversand lighthouse on the Eiderstedt peninsula north
of St. Peter Ordinig, and the Hörnum lighthouse on Sylt. The
Pellworm tower was erected on 127 oak piles, each of which are 3,5m
long.
The lighthouse was assembled
from 600 individual steel components, produced in Isselburg steelworks,
and held together by 16,000 bolts.
Problems caused by dampness
in the past have now been solved as humidity inside the tower is
now automatically regulated.
In August 2002 the lighthouse
was converted to a leading light with three sectors, which now guides
maritime vessels through the Norderhever on their way to Husum.
Before these changes, Pellworm was a directional beam with a lower
front light.
Since it was first commissioned
in 1907, Pellworm lighthouse has been electrically powered. In those
days 100 storage batteries supplied the beacon with electricity
at night - they were charged by two 16 horsepower one-cylinder diesel
engines. Today the tower is supplied with electricity from the public
power station or, in the event of a power cut, by a diesel generator.
There are enough fuel supplies to last one week.
In the meantime, the
original Fresnel lens has been replaced by a modern light cannon
with a six-time-changer, whose halogen bulbs burn for 2000 hours.
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