10%

What does light transmission mean?

• Light transmission (or light transmittance) indicates how much visible light passes through a lens.
• It is measured in percent (%).
• A lower percentage means less light is transmitted (darker lenses), while a higher percentage means more light is transmitted (lighter lenses).

Costa values: 10% - 14.81%

• This range from 10% to 14.81% indicates that Costa sunglasses are designed for bright light conditions.
• Lenses with 10% light transmission are very dark and offer maximum glare protection, ideal for intense sunlight, e.g., when fishing on the open sea.
• Lenses with 14.81% allow slightly more light through, making them more versatile for various outdoor activities, while still providing good glare protection.

Why the difference?

• The lower value (10%) is typically offered in the performance models, which are designed for specific activities like fishing, where maximum glare protection is crucial.
• The higher value (14.81%) is more common in the lifestyle models. These offer a balanced protection for everyday use and a variety of outdoor activities without severely limiting visual clarity.
• It is important to note that these are polarized lenses. Polarization itself greatly helps in reducing distracting light.

Costa offers a range of light transmission values to meet the different needs of anglers and outdoor enthusiasts. The choice of the right value depends on the specific activities and light conditions under which the sunglasses are to be used.