re blue led s gladman aviv said re blue led s to all on ga in order to emit blue light a semiconductor must have a band gap ga energy within the region of to electron volts according to my ga physical electronics prof you can t get an led with that band gap ga that s why you don t find blue leds or for that matter some other ga colour of leds that is not to say that blue leds can t be found i ve ga seen blue leds sold but they were just your typical visible light ga led in a blue plastic covering they didn t emit very much light this is not true they have and do make blue led s they are about in digikey nm wavelength by the way stephen cyberman toz buffalo ny us mangled on sun at i think k will be enough bill gates blue wave qwk v
