Direct wire to bypass the ballast to reduce energy use and eliminate ballast compatibilitySafety First: 1) Internal safety switch (protects installer), 2) Internal misapplication circuit (protects end-user), 3) Optional In-line fuse kit (protects future installer)Complete offering for everyday applications and additional premium performance/long life options available50,000 hr life with 5 year warranty and 70,000 hr life with 7 year warranty