Halo Automotive Purple White 899 (12v 38w) Bulb - Twin Pack Halo Automotive Purple White series features a unique blue and purple coating giving these bulbs a highly desirable deep purple color Halo bulbs are engineered with anti-vibration and long life technology combined this increases the life of Halo bulbs by 30 percentage Halo bulbs are made with the highest quality quartz glass making them resistant to shattering and moisture Halo Bulbs have the ultimate performance, looks, and reliability Halo Bulbs outlast and out perform the competition for a fraction of the price