Stevenson labored for the Northern Lighthouse Board for just about fifty a long time[22] throughout which time he built and oversaw the development and later on enhancement of various lighthouses. He innovated in the selection of light resources, mountings, reflector layout, the usage of Fresnel lenses, As well as in rotation and shuttering systems

[19] The dovetailing attribute served to Increase the structural stability, While Smeaton also needed to taper the thickness of the tower towards the best, for which he curved the tower inwards on a gentle gradient. This profile had the additional benefit of permitting a number of the Power of your waves to dissipate on effect While using the walls