VLT (Visible Light Transmission)

VLT is measured at the eye-sensitive band of the visible spectrum (around 380–780 nm). A VLT of 70% means 70% of visible light gets through the combined glass + film stack — which is the LTA's minimum for the windscreen and front side windows.

Most Singapore OEM glass already has around 80% VLT before any tint is added, which means a 90% VLT film typically yields 72% measured VLT — just inside compliance. Quality workshops measure post-installation VLT with a calibrated meter before releasing the car.

VLT is not the same as how dark the tint looks. A clear film can still reject most IR and UV. Conversely, a very dark tint may have low VLT and high heat rejection but is illegal on the windscreen and front sides.