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.
It was true of the old CFL tube TVs, and it is true of modern HDTVs. And repairing the latter is not desirable. So how long does an LED TV last before it becomes unwatchable? Numbers vary, depending on different manufacturer claims, but it is often estimated to be between 60,000 to 100,000 hours. What Causes Dimness? Why do LED TVs get dim over time?