Quad headlights are a great way to get more light out on the road ahead of you when you are driving. Essentially, quad headlights are a car's low-beam headlights and a car's high-beam headlights working together at the same time.
Quad headlights offer near-term visibility as they include the use of a car's low-beam headlights.
Quad headlights offer long-range visibility as they include the use of a car's high-beam lights.
Quad headlights may be activated either on a manual or on an automatic basis.
Quad headlights need to be installed for them to work on an automatic basis. The automatic functionality does not come standard on most vehicles.
Quad headlights set in their manual state require a driver to be able to multitask while driving. The driver will have to focus on holding the high beam lever in the engaged position while dealing with all of the other intricacies associated with driving.