Light-emitting diode light-emitting diode (U.S. Patent US3293513), the first practical LED. Immediately after filing the patent, Texas Instruments (TI) began a project to manufacture infrared diodes. In October 1962, TI announced the first commercial LED product (the SNX-100), which employed a pure GaAs crystal to emit a 890 nm light output. In October 1963, TI announced the first commercial hemispherical LED, the SNX-110. The first visible-spectrum (red) LED was developed in 1962 by Nick Holonyak, Jr. while working at General Electric. Holonyak first reported his LED in the journal "Applied Physics Letters" on December 1, 1962. M. George Craford, a former graduate
Whitefish Point Light had two unevenly spaced eclipses, and two flashes within every 20 second period. Putting aside questions of nostalgia, aesthetics, or appreciation for the engineering of a bygone era (as exemplified by the Fresnel lens), this iteration of lighthouse illumination was itself incredibly effective, and an endangered remnant of another bygone era. The station was automated in 1971. In 2011, the U.S. Coast Guard Local Notice to Mariners reported reduced intensity of the Whitefish Point light from June 7, 2011 until August 16, 2011, when the DCB-224 Series Carlisle & Finch aerobeacon lens was changed to a light-emitting diode (LED) lantern