It is also considered to be 90% more energy-efficient compared to similarly luminous light types. The beam angle is wide and adjustable to cover up to 360 degrees, which is a big plus. Bright, ...

As of December 20 at 9:36:02 AM EST. Market Open.

As of December 10 at 3:12:11 PM EST. Market Open.

Tiny, Wireless Antennas Use Light to Monitor Cellular Communication ... 229 embedded in a transparent crystal when hit by a laser beam could yield the most accurate measurements ever of time ...

A 1000-lumen spotlight is capable of shining 500-650 feet far, depending on its design and the light beam angle. For indoor use and if the space is narrow, a 300lm handheld spotlight is bright enough.

At close: November 19 at 2:27 p.m. EST ...

National Geographic's enterprising photographers have helped readers explore and learn about our beautiful world through their images for more than a century. Here is their best work from the past ...