ACDelco stands for quality. Get the performance you need with ACDelco products. ACDelco Headlight Bulbs illuminate the roadway in front of your vehicle during low light conditions and are an ideal high-quality replacement component for many vehicles on the road today. Different technologies are used in headlight bulbs; the most common include Halogen bulbs. Halogen bulbs give off a characteristic yellow/white color. ACDelco products are developed to exceed your performance expectations and deliver the durability you expect.