The quantity of visible light that may flow through an optical or solar lens is known as visible light transmission. It is also known as VLT percent or visible light transmittance. This represents the blackness of a lens inside a first pair of glasses as a percentage. The sun lens will be darker the lower the VLT.
Visible Light Transmission
The volume of visible light that travels through a lens is known as visual light transmission, or VLT. As an illustration, a lens with a VLT of 12 percent lets through 12 percent of light while blocking 88 percent of it. How much heat protection, UV protection, and security protection you will receive depends heavily on the VLT of the window film. The fraction of light that passes through tinted glass is used to compute VLT.
How You Are Affected
Do not forget that VLT is only one characteristic used to characterize solar film. You are only affected by VLT to the extent that the films allow for a certain quantity of light. If you want a cozy, dark room, opt for a low VLT. On the other side, pick a high VLT if you prefer a bright setting with UV protection. You still receive protection from UV radiation, fading, and glare regardless of how much light travels through the films. Additionally, you gain from increased security thanks to window tints’ reinforced glass. There are several things to think about when purchasing for window films, including UV rejection, thickness, internal reflectivity, and visible light transmission. Pay close attention to these elements since they provide you with valuable information about the movie and the performance you may anticipate.
It’s vital to note that the film becomes darker as less light goes through it. More light is obstructed and cannot flow through a darker colour. However, this does not necessarily imply that if you want a low VLT, you should choose the darkest hue. The most common window film colours are black and brown, although these hues don’t necessarily have low VLTs. A window tint with a VLT of 50 for a forest green is different from one with a VLT of 15 for a brown tint.
Categories of VLT Percentages
Light passes through more readily with a greater VLT percentage (a higher percentage is ideal in low-light situations), and less readily with a lower percentage (a low percent is great for bright conditions). The VLT percentages can alternatively be divided into the following five groups:
S0 | VLT% 80% – 100% Lenses =
Skiing or riding at night. None or a very faint colour. These are the only types of lenses that are Clear.
S1 | VLT% 43% – 80% Lenses =
A cloudy, gloomy day with nighttime skiing and riding. The world is grey! Rainy days. Blizzards. Late afternoon or early morning. LED lighting. The tint on these lenses is subtle.
S2 | VLT% 18% – 43% =
fluctuating sun, passing clouds. flitting shadows. any circumstances. Universal. These lenses feature a medium tint and are made to function effectively in every lighting situation. This is the lens category and VLT percent range that we suggest most.
S3 | VLT% 8% – 18%=
Sunny. glaring sun. Springtime biking or skiing. These lenses have a dark tint and are made to function effectively in strong lighting.
S4 | VLT% 3% – 8% =
sunny, glacier skiing or riding at a high height. Summertime biking or skiing. These lenses have a very dark tint and are made to function effectively in strong lighting.
Your level of enjoyment can be significantly impacted by changing lighting conditions. When the light shifts, you should be prepared with correctly tinted lenses or with so-called “All Conditions Lenses,” which can withstand a variety of weather, terrain, and circumstances. Visual Light Transmission, or VLT, percent units are used to measure how much light each lens lets into your eyes. Light passes through more readily with a greater VLT percentage (a higher percentage is ideal in low-light situations), and less readily with a lower percentage (a low percent is great for bright conditions).