re blue led s in article zw f b w w inqmind bison mb ca baden inqmind bison mb ca baden de bari writes so what s the story here we re all stuck with the regular green red and off yellow orange led s what gives anybody have a scoop on fairly low priced blue led s in order to emit blue light a semiconductor must have a band gap energy within the region of to electron volts according to my physical electronics prof you can t get an led with that band gap that s why you don t find blue leds or for that matter some other colour of leds that is not to say that blue leds can t be found i ve seen blue leds sold but they were just your typical visible light led in a blue plastic covering they didn t emit very much light source solid state electronic devices ben g streetman d ed prentice hall right planet wrong universe douglas adams if we took the bones out it wouldn t be crunchy mr whizzo
