As with most products there is a quality factor and price difference. The new style of Night White, Ion Spark that offer a whiter color output than OEM bulbs that have a longer light beam that increases safty, style and performance. These Night White and Ion bulbs are DOT approved.
Putco Ion Spark White Pure halogen bulbs in 3800 Kelvin are DOT approved offer vastly improved light over OEM headlight bulbs.