The percentage or fraction of visible light transmitted by a window or skylight.

The percentage or fraction of light that is transmitted through the glazing surface.

(VT): An optical property that indicates the amount of visible light passing through a window. Most VT values range between 0.3 and 0.8.[xxiii] The higher the VT the more light transmitted. For maximizing daylight and view, select window glazing with a VT of 0.50 or higher.

A MEASURE OF THE AMOUNT OF VISIBLE LIGHT TRANSMITTED THROUGH THE GLASS. IT IS REFERRED TO AS VT. IT IS EXPRESSED IN DECIMAL VALUES BETWEEN 0 AND 1.0. THE HIGHER THE VT, THE MORE DAY LIGHT IS TRANSMITTED THROUGH THE WINDOW. CLEAR GLASS WILL LET @ 82% OF LIGHT THROUGH WHILE LOW-E GLASS WILL LET @ 78% OF LIGHT THROUGH. SEE VISIBLE LIGHT ABOVE.

ratio of the visible radiation transmitted through a body to the incident radiation in the same range (a.k.a. light transmittance) [--]   Lichttrans- missionsgrad

Visible Transmittance (VT) measures how much light comes through a product. The visible transmittance is an optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted.

The percentage or fraction of the visible spectrum (380 to 720 nanometers) weighted by the sensitivity of the eye that is transmitted through the glazing.

Visible transmittance (VT) describes how much available light comes through a window, and is expressed as a percentage. The higher the VT, the more daylight a product lets in. A good VT is about 55%.