The city of Lockhart is named after Byrd Lockhart, an assistant surveyor of Green DeWitt and reportedly the first Anglo to set foot in Caldwell County. Lockhart was the site of a victory of the Texans over the Comanche, at the Battle of Plum Creek in 1840.
To know if you need a travel plug adapter to go to Iceland, you have to consider 3 things : the shape of the plugs, the voltage and the frequency of the current delivered by electrical outlets in Iceland. Here are the shape of the sockets in Iceland, and the the types of plugs used in Iceland : type C.
Iceland uses more power per head than any other country in the world, primarily because of its fishing and heavy industry. Over the next 20-30 years Iceland plan to use geothermal electricity to split hydrogen from water, and then to use hydrogen fuel cells to power its vehicles and fishing trawlers. This would make Iceland energy self-sufficient and 100% powered by renewable energy.