Happy National LED Light Day! On this date in 2014, the Nobel Prize committee awarded the prize in Physics to three electronics wizards who developed the blue LED in the early 1990s. The first LEDs, around 1972, were red, and other colors in the spectrum followed, but blue proved to be the most difficult to achieve. My sparkly LED tie has many bright colors and shifting patterns! Today's sparkles also honor the birthday (tomorrow) of Sallie Florence (Schappell) Kleppinger (1888-1969), my paternal grandmother!
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