Assertion: led | /r/HasProperty | produced
Facets:
Source sentences:
text: The first LEDs to be produced were red, but since then many other colours have been introduced.
text: LEDs may emit light in one wavelength range, by way of example red, amber, yellow, green, blue, etc. or may be manufactured to emit white light by employing a wide variety of different types of semiconductor materials such as, for example, III-V semiconductor materials, and II-V semiconductor materials.