Assertion: red light's wavelength | /r/ObjectUse | used in research
Facets:
Source sentences:
text: Popular wavelengths used in research and in-home products are 630 nm and 660 nm.
text: The most common wavelengths used in research are 630 nm and 660 nm (which is why the Joovv Light is designed to emit red light in a tight spectrum of 660 nm).