Assertion: led's efficiency | /r/CapableOf | achieve 620 nm
Facets:
value: at shorter wavelengths of e.g.
type: OTHER
Source sentences:
text: The internal quantum efficiency can be close to 100% for emission wavelengths around 650 nm, whereas high efficiencies are much more difficult to achieve at shorter wavelengths of e.g. 620 nm, where the human eye is more sensitive.