LED Art 

led Art did ot start to appear until very late in the 20th century. This is because LEDs did not appear in any electrical ligthing application at all until 1962. And these original LEDs were certainly of no interest to artists, scientists had not yet worked out how to use semiconductor diodes across the entire light energy and color sepectrums,In fact, those early LEDs were almost exclusively red in color,The earliest LED lights were very weak as well. 

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