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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 is a popular use for LED lighting?
A: traffic signals

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Major League Baseball is especially well known for red teams. The Cincinnati Red Stockings are the oldest professional baseball team, dating back to 1869. The franchise soon relocated to Boston and is now the Atlanta Braves, but its name survives as the origin for both the Cincinnati Reds and Boston Red Sox. During the 1950s when red was strongly associated with communism, the modern Cincinnati team was known as the "Redlegs" and the term was used on baseball cards. After the red scare faded, the team was known as the "Reds" again. The Los Angeles Angels of Anaheim are also known for their color red, as are the St. Louis Cardinals, Arizona Diamondbacks, and the Philadelphia Phillies.
When did the Cincinnati Red Stockings come to be?
A: 1869

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In the decades since Furman, new questions have emerged about whether or not prosecutorial arbitrariness has replaced sentencing arbitrariness. A study by Pepperdine University School of Law published in Temple Law Review, "Unpredictable Doom and Lethal Injustice: An Argument for Greater Transparency in Death Penalty Decisions," surveyed the decision-making process among prosecutors in various states. The authors found that prosecutors' capital punishment filing decisions remain marked by local "idiosyncrasies," suggesting they are not in keeping with the spirit of the Supreme Court's directive. This means that "the very types of unfairness that the Supreme Court sought to eliminate" may still "infect capital cases." Wide prosecutorial discretion remains because of overly broad criteria. California law, for example, has 22 "special circumstances," making nearly all premeditated murders potential capital cases. The 32 death penalty states have varying numbers and types of "death qualifiers" – circumstances that allow for capital charges. The number varies from a high of 34 in California to 22 in Colorado and Delaware to 12 in Texas, Nebraska, Georgia and Montana. The study's authors call for reform of state procedures along the lines of reforms in the federal system, which the U.S. Department of Justice initiated with a 1995 protocol. Crimes subject to the death penalty vary by jurisdiction. All jurisdictions that use capital punishment designate the highest grade of murder a capital crime, although most jurisdictions require aggravating circumstances. Treason against the United States, as well as treason against the states of Arkansas, California, Georgia, Louisiana, Mississippi, and Missouri are capital offenses.
What happened in 1997?
A: unanswerable

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In 2003, additional UN sanctions were placed on Liberian timber exports, which had risen from US$5 million in 1997 to over US$100 million in 2002 and were believed to be funding rebels in Sierra Leone. These sanctions were lifted in 2006. Due in large part to foreign aid and investment inflow following the end of the war, Liberia maintains a large account deficit, which peaked at nearly 60% in 2008. Liberia gained observer status with the World Trade Organization in 2010 and is in the process of acquiring full member status.
In what year were World Trade Organization sanctions lifted?
A:
unanswerable