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quiz


1. LEDs are projected to become the dominant form of illumination by what year?	2. LEDs generate their light using which of the following?	3. Just as halogen lights use a transformer and fluorescent fixtures use a ballast to regulate their electrical current, LEDs use which one of the following?	4. LEDs don't burn out, but gradually grow more dim over time. So at the end of its expected life, an LED will retain how much of its original brightness?	5. How much longer can LEDs last than incandescents?
6. How much longer can LEDs last than fluorescents?	7. When LEDs are manufactured, they are broadly grouped into color categories generally known as what?	8. Most light bulbs measure brightness in watts, while LEDs' brightness is measured in what?	9. Switched on seven hours a day, the average LED bulb could last how long?	10. Compared to standard incandescents, LEDs save how much more energy?

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