Powerful Little Light: LED With 1,000 Lumens

Osram has developed a small light-emitting diode spotlight that achieves an output of more than 1,000 lumens for the first time. That’s brighter than a 50-watt halogen lamp, thereby making the device suitable ...

Mar 15, 2007
4.4 / 5 (336) 3

Start school later in the morning, say sleepy teens

A survey of sleep-deprived teens finds they think that a later start time for school and tests given later in the school day would result in better grades. The survey was presented at the American Thoracic Society 2007 International ...

May 20, 2007
4.3 / 5 (345) 0