S2 LED headlights come in different sizes and halogen bulbs. While LED headlights come in different sizes, halogen bulbs are the most popular type of LED headlights and Halogen bulbs.
Halogen bulbs are the most common type of headlights on in market. While they are lighter than the Halogen bulbs, they are less common. The cheapest headlights available on Alibaba.com make not one of the cheapest headlights available.