 The control center for the <unk> of images , water flow , and lighting color and intensity is beneath one of the towers , in a room that covers 550 square feet ( 51 m2 ) . The room houses high @-@ definition video servers and equipment temperature sensors . Hard drives contain all the individual electronic computer files of the face videos . Generally , the computer programs automatically perform tasks such as determining when the face will <unk> and , if weather conditions permit , when to turn the water on and off . Using <unk> rather than high @-@ resolution images was both less expensive and created a better display for the average viewer . A Barco show controller selects the sequence of faces one at a time and determines a random tower lighting selection of one of eight LED colors programmed into an Electronic Theatre <unk> ( <unk> ) <unk> control system . At night , the <unk> system controls <unk> that illuminate the cascading water and that are <unk> by special wet @-@ use location ground fault circuit <unk> . The control room covers an area equal to 26 parking spaces in the underground parking garage , which costs the city $ 100 @,@ 000 annually in terms of the opportunity cost of lost revenue ( in 2004 dollars ) . Maintenance issues for the fountain range from kids removing the <unk> between the bricks to pipes in need of maintenance . As of 2014 , annual upkeep costs were approximately $ 400 @,@ 000 . 
