What Is Visible Light Transmission (VLT)? Understanding Sunglass Lens Darkness
What Does VLT Mean In Sunglasses?
When shopping for sunglasses, you may have seen the term Visible Light Transmission (VLT). But what does it actually mean?
VLT is the percentage of visible light that passes through a sunglass lens and reaches your eyes. In simple terms, it determines how bright or dark your view appears when wearing your sunglasses.
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Lower VLT = Less light reaches your eyes, creating a darker viewing experience.
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Higher VLT = More light reaches your eyes, creating a slightly brighter viewing experience.
For example, a lens with an 11% VLT allows slightly less light through than a lens with a 15.5% VLT. Both are designed for bright outdoor conditions. The difference comes down to the viewing experience you prefer.
BEX® sunglasses are available in a range of 11% to 15.5% VLT, giving you options based on your personal preference.
The best lens isn’t the darkest. It’s the one that feels right for you.
VLT Is Only Part of the Picture
While VLT is important, it's only one part of what makes a great pair of sunglasses. Your overall viewing experience is also influenced by:
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Lens tint
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Polarization
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Optical clarity
BEX® lenses are designed as complete optical systems, balancing VLT, tint, and polarization to deliver comfort and clarity throughout the day.
Whether you’re riding fence lines at sunrise, stepping into the arena, casting across open water, exploring backcountry trails, or spending the day under the sun, BEX® offers premium polarized lens options designed for ranch work, fishing, outdoor adventures, and everyday wear. Each lens is engineered to deliver clarity, comfort, and protection in bright conditions.
How Sunglass Lens Technology Works With VLT?
While VLT determines how much visible light reaches your eyes, it does not determine the level of protection or overall lens performance. That comes from the technology behind the lens.
A darker lens does not automatically mean more protection. VLT controls the amount of visible light entering your eyes, while polarization and lens technology help manage glare, clarity, and overall performance.
Every BEX® polarized lens is engineered with Category 3 darkness and powered by NYPO® Technology, combining advanced protection, polarization, and optical clarity for bright outdoor conditions.
Whether you prefer an 11% VLT lens for a darker viewing experience or a 15.5% VLT lens for slightly more light and contrast, every BEX® lens is designed to deliver:
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100% UVA & UVB protection with reduced HEV blue light transmission
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Polarized performance to reduce glare
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Premium optical clarity designed to reduce distortion
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Comfortable vision in bright sunlight
Category 3 lenses are ideal for:
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Bright, sunny days
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Open environments like deserts, water, and mountains
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Daytime driving
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Everyday outdoor wear
The difference between BEX® lens options comes down to your environment and the way you prefer to see the world. Some riders, anglers, and outdoor enthusiasts prefer a darker lens for intense sunlight, while others prefer a slightly brighter lens for added contrast and detail.
No matter which BEX® lens you choose, you’re getting the same trusted protection and performance built for the outdoors.
Find Your Perfect Pair
Explore our collection of Category 3 polarized sunglasses and find the lens that matches your style, your environment, and the way you like to see the world.
