Tint responds differently based on material and coatings. Plastic will take a tint darker than a polycarbonate material. Most prescription tinted lenses are specified both by their color and a number that indicates the approximate luminous transmittance of the lens. Light tints, #1 tints, have transmittance values of about 75% to 85% and are used as fashion tints. Medium, or #2 tints, have transmittances of about 50%.  Dark tints, #3 tints, are commonly prescribed as sunglasses and have transmittances of approximately 20%.  We also offer a G-15 tint that is a green tint that was developed by the RayBan company as their signature tint.
Read more about Tint Options here