21. This digital installation presents motion with digital programming and flickers of light through Light Emitting Diodes. 22. Early applications included imaging using QD infrared photodetectors, light emitting diodes and single-color light emitting devices. 23. Early applications included imaging using QD infrared photodetectors, light emitting diodes and single-color light emitting devices. 24. In June, 2009 the Coast Guard proposed changing the light to a green Light emitting diode. 25. Professor Scherer also fabricated some of the first surface Plasmon enhanced high brightness light emitting diodes. 26. In modern sense, OWC uses either laser s or light emitting diodes ( LEDs ) as transmitters. 27. Recent developments in semiconductor technology allows for the development of UV-C Light Emitting Diodes ( LEDs ). 28. The LED display module has an array of light emitting diodes mounted thereon, and a longitudinal axis. 29. In 2009, Brookings, South Dakota-based Daktronics installed light emitting diode ( LED ) displays at the stadium. 30. He owns intellectual property in the area of material processing and die architecture of light emitting diodes.