VLT is a measurement that specifies the percentage of light coming through the lens and reaching your eyes. A totally clear lens for dark conditions typically have around 90% VLT and a very dark colored lens with mirror for sunny conditions may have down to 10% VLT. Most allround lenses will be found between 30 to 60 %. In our range you will find alternatives for all kinds of conditions, please have a look at our lens overview to chose a lens according to your needs.