SubLGT
Flashlight Enthusiast
Just a tidbit from the IIHS test protocol:
"...Headlights are tested as received from the dealer. Although many headlight problems could be resolved by adjusting the aim of the lamps, IIHS doesn't change headlight aim. Few vehicle owners adjust the vertical aim of their headlights, so leaving the aim the way it was set at the factory makes the testing more realistic. Horizontal aim also is important, but in most vehicles it can't be changed after the initial factory setting.
Readings are taken 10 inches from the ground for visibility and 3 feet, 7 inches from the ground for glare…"
"...Headlights are tested as received from the dealer. Although many headlight problems could be resolved by adjusting the aim of the lamps, IIHS doesn't change headlight aim. Few vehicle owners adjust the vertical aim of their headlights, so leaving the aim the way it was set at the factory makes the testing more realistic. Horizontal aim also is important, but in most vehicles it can't be changed after the initial factory setting.
Readings are taken 10 inches from the ground for visibility and 3 feet, 7 inches from the ground for glare…"