Smeaton's Tower Smeaton's Tower Smeaton's Tower is a memorial to celebrated civil engineer John Smeaton, designer of the third and most notable Eddystone Lighthouse. A major step forward in lighthouse design, Smeaton's structure was in use from 1759 to 1877, until erosion of the ledge it was built upon forced new construction. The tower was largely dismantled and rebuilt on Plymouth Hoe in Plymouth, Devon, where it stands today. The Royal Society recommended Smeaton for the task, and he modelled the lighthouse on an oak tree. He rediscovered the use of hydraulic lime, a form of concrete used in Roman times. The
Hellisøy Lighthouse round cast iron tower is painted red with two narrow white horizontal bands. There is a 3rd order Fresnel lens in the lighthouse that has been in use since 1903. The lens puts out a light with an intensity of 960,000 candela which can be seen for up to . Hellisøy Lighthouse Hellisøy Lighthouse () is a coastal lighthouse in Fedje municipality in Hordaland county, Norway. The lighthouse lies on the small island of Hellisøy, just off the southwest coast of the larger island of Fedje. This tower was built in 1855, making it Norway's second-oldest cast iron lighthouse. It