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Most light emitters, from candles to light bulbs to computer screens, look the same from any angle. But in a paper published this week on the Nature Photonics website, MIT researchers report the development of a new light source — a fiber only a little thicker than a human hair — whose brightness can be controllably varied for different viewers.

Someone Else’s Twin: The True Story of Babies Switched at Birth by Nancy L. Segal

He is the founder and CEO of TwoChop, a content gamification platform that takes content and turns it into games. Advertisement: Grainger has lighting products covered.

Homeowners looking to save electricity costs should replace all their incandescent light bulbs with LED-based lights instead of installing a small solar photovoltaic system, a report by J.P. Morgan shows. Light-emitting diodes, or LEDs, will become mainstream over the next 12 months as improving technology and performance and higher subsidies lead to a rapid drop in costs, according to the report

Changing light bulbs won’t save the world. [More]