Guarded by a heavy steel framework, you might find a lamp like this at the top of a radio tower to ward off airplanes, or inside a submarine to signal a red alert.
Part of the "JC Fleet 2" family of models. Get them all here: http://www.peripheralarbor.com/ProjectLondon/

Like this model, but need something a bit different? I take commissions! http://peripheralarbor.com/commission/