 1563 there was a new stone tower with 12 candlelight as source for light but already 1585 it was replaced with a covered lantern and from 1624 coal was used for light.During the centuries wood, candlelights, coal, oil, kerosene and electricity have been used to send out a beam that reached 50K as a minimum.The present lighthouse is built in stone and brick and has three large 1 order Fresnel lenses in a lens house that rotates four times per minute, hence giving twelve flashes per minute.