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Recent developments in LEDs permit them to be used in environmental and task lighting. LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. Light-emitting diodes are now used in applications as diverse as aviation lighting, automotive headlamps, advertising, general lighting, traffic signals, camera flashes and lighted wallpaper. As of 2015[update], LEDs powerful enough for room lighting remain somewhat more expensive, and require more precise current and heat management, than compact fluorescent lamp sources of comparable output.
What type of atmosphere can LED lighting be used?
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The answer: environmental

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Adolescence is also a time for rapid cognitive development. Piaget describes adolescence as the stage of life in which the individual's thoughts start taking more of an abstract form and the egocentric thoughts decrease. This allows the individual to think and reason in a wider perspective. A combination of behavioural and fMRI studies have demonstrated development of executive functions, that is, cognitive skills that enable the control and coordination of thoughts and behaviour, which are generally associated with the prefrontal cortex. The thoughts, ideas and concepts developed at this period of life greatly influence one's future life, playing a major role in character and personality formation.
Which cortex is commonly associated with the coordination of thoughts and behavior?
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The answer: prefrontal cortex

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Schwarzenegger came out of retirement, however, to compete in the 1980 Mr. Olympia. Schwarzenegger was training for his role in Conan, and he got into such good shape because of the running, horseback riding and sword training, that he decided he wanted to win the Mr. Olympia contest one last time. He kept this plan a secret, in the event that a training accident would prevent his entry and cause him to lose face. Schwarzenegger had been hired to provide color commentary for network television, when he announced at the eleventh hour that while he was there: "Why not compete?" Schwarzenegger ended up winning the event with only seven weeks of preparation. After being declared Mr. Olympia for a seventh time, Schwarzenegger then officially retired from competition.
For what Hollywood role was Schwarzenegger training in 1980?
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The answer: Conan

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The notion of the "Land of Israel", known in Hebrew as Eretz Yisrael, has been important and sacred to the Jewish people since Biblical times. According to the Torah, God promised the land to the three Patriarchs of the Jewish people. On the basis of scripture, the period of the three Patriarchs has been placed somewhere in the early 2nd millennium BCE, and the first Kingdom of Israel was established around the 11th century BCE. Subsequent Israelite kingdoms and states ruled intermittently over the next four hundred years, and are known from various extra-biblical sources.
According to the Torah, God promised the land to how many people?
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The answer:
three