Generate 670nm light?

A customer shared a CNN article on the benefits of 670nm light on improving vision. She asked if LIFX lights could generate 670nm light. Has anyone analyzed red light with a spectrometer to determine the wavelength? If so, do you know the setting that generates 670nm?

it’s a non-trivial thing but #FF0000 is pure red and so is 670nm
You can set RGB values with the API if you want the pure red.