1. It was going forward; the backup lights never came on. 2. Early models also featured a single separate bumper-mounted backup light . 3. Since 1993, automatic garage doors have featured an invisible backup light beam. 4. Each diver generally carries a primary light, and at least one backup light . 5. In 1971, the backup lights were on the left and right instead of the middle. 6. However, Fresnel lenses continue in wide use in automobile tail, marker, and backup lights . 7. The primary light should last the planned duration of the dive, as should the backup lights . 8. The revised rear end also featured full-width taillamps and a single center mounted backup light . 9. Brighter headlights and backup lights add to the visibility, and the lights come on automatically when needed. 10. New standard safety features included a padded instrument panel, outside driver-side rear view mirror and backup lights .