Assertion: red light's wavelength | /r/HasProperty | 660 nm
Facets:
Source sentences:
text: Popular wavelengths used in research and in-home products are 630 nm and 660 nm.
text: Joovv discloses the wavelengths they use – 660 nm for red light and 850 nm for near-infrared light.
text: The light wavelength is about 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).