Light permeability:

For insulating glass with and without the use of coated surfaces, the light permeability depends significantly on the thickness of the individual panes used. The data provided in the tables for the light permeability of the insulating glass apply to individual glass thicknesses of 4 mm each for thermal insulating glass and 6 or 4 mm for solar protection glass. The percentages include a tolerance of ± 2 percentage points.