If you eventually plan to take all four parts of the exam, you can check all four boxes. After you pass one part of the exam you have 18 months to take and pass the other three parts. See the 18 month requirements below (How do I calculate the 18 months rolling window?).
Though you may not notice, as bulbs age they don't generate as much light as when they were new. That means your headlights may still work after five or six years, but they may not be as bright or illuminate as much of the road as they used to.
Alternatively the light beam can be directed by a projector lens within the headlight housing, such as the ones found in the Mazda MX-5 (above, right). Combing low cost and a working life of between 500 and 1000 hours, halogen bulbs are the most common headlamp type in use today, although that is rapidly changing.or headlights with an output over 2000 lumens (thatâs all HID units, basically) a headlamp washer and self levelling system is required, and cars sold with halogen lights usually arenât equipped with either feature.