For the 2009-2018 Dodge Ram 1500, the factory halogen headlights are available in two primary configurations: a highly efficient "Quad" setup where all four bulbs illuminate for high beams, and a standard dual-filament setup . Many aftermarket replacements utilize projector lenses with halogen bulbs, often using H7 for low beam and H1, H9, or 9005 for high beam, to improve light focus and distribution .