What are FL Pro TheraSpecs' visible light transmission (VLT)?

FL-Pro™ TheraSpecs come in three different tint strengths:

"standard" - which filters 35% of light, "extra" - which filters 50% of light, and "max" which filters 74% of light.

All of these tint levels were designed to filter out the most problematic wavelengths that have been shown to make light sensitivity worse.