in part 1, the eye reflection spectroscopy showed that a large range of wavelengths all the way from green to blue are being reflected. part 2 tries to increase the relative luminosity and with it, saturation of a specific color in the middle of the reflected wavelength range. a 470nm led is being used here.
even though it seems like the flashlight has the correct wavelength and its light is being reflected decently, the effect is less prominent (and useful) than anticipated.