Assertion: red light's effect | /r/HasProperty | due
Facets:
value: to ultraviolet light
type: CAUSE
Source sentences:
text: He thought that the beneficial effect was due to ultraviolet light killing the bacteria, but recent studies showed that his lens and filter system did not allow such short wavelengths to pass through, leading instead to the conclusion that light of approximately 400 nanometers generated reactive oxygen that would kill the bacteria.