"Alejandro and Moira Siña are Light Artists based in Boston. Their use of single electrode Neon and almost invisible wiring enables them to create large ethereal lightworks."
"Spinning Shaft rotates to create the perception of a cylinder or a virtual image of light. As it turns at a constant speed, a neon without electrodes pulses on and off with varied timing. The rhythm and speed are determined by analogue electronics and programmed patterns that take approximately two minutes to
cycle. [...]The work offers the spectator many views; one can see a hollow light cylinder by its side as well as a view of the inside of this generated light tunnel." 
 Edward A. Shanken, Art and Electronic Media, p. 69