I've taken a couple of spectroscopy images of the light from a halogen bulb as viewed direct, through a pair of normal (polarised) brown-tinted sunglasses, and through the EnChroma Cx 15 lenses.
The normal sunglasses suppress light more or less uniformly across all wavelengths, whereas the EnChroma glasses have two very distinct bands where virtually all light is blocked out - see attached images.
I've also shot a short video - you should have no trouble working out when the normal sunglasses and the EnChroma lenses come between the light and the spectroscope.
https://youtu.be/Df_b7dJ4f5s