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.
Solar powered garden lights can last for a very long time. Most units have a manufacturers warranty of about 1 year. Your lights will probably stay fully functional for about 2 years after which you may start to notice a decline in performance.his is usually the fault of the battery which just can't handle be charged and recharged so many times. Usually the battery is a simple AA so it can be easily and cheaply replaced. The solar panels themsleves will last for an extremely long time.