The best is light tint sa front windshield. The rest ikaw na bahala kung ano gusto mo. If naka-HID headlights ka, pwede na rin medium tint sa front windshield.

At night time,

HID + Light tint (35% VLT) = Halogen + Clear tint (70% VLT)
HID + Medium tint (20% VLT) = Halogen + Light tint (35% VLT)
HID + Medium tint (20%) < Halogen + Clear tint (70% VLT)