Something like this:
Lens Tints Light Transmission Intended Use
Smoke 10% Bright sunny conditions. Ideal for winter days.
Orange 37% Changing light and shadow; variable weather. Perfect for forest environment.
Blue 66% Partly cloudy, overcast.
Yellow 85% Low light conditions and indoor.
Transparent 92% Designed for protection of the eyes from dust; excellent for very cold climates.
Are your glasses the Prorace Chopper?