Sentence:  With these gadgets - impressive to the gullible because of their flashing <WSD>light</WSD> bulbs , ticks , and buzzes - he then carries out a vicious medical con game , capitalizing on people 's respect for the electrical and atomic wonders of our scientific age . 
Meaning of the word marked with <WSD> tags:  electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity