Visible Data tab on Panes Dialog.
The visible transmittance at normal incidence averaged over the solar spectrum, and weighted by the response of the human eye.
The inside (back-side) and outside (front-side) visible reflectance properties of the pane at normal incidence averaged over the solar spectrum, and weighted by the response of the human eye.
Note, For uncoated glass, when alternative optical properties (thickness, visible index of refraction, and visible extinction coefficient) are available, they can be converted to equivalent visible transmittance and reflectance values using the equations given in 'Conversion from Alternative Specification of Glass Optical Properties' in the EnergyPlus documentation).