Engineeringness on MSN

How LEDs Work: The Tiny Lights Inside Everything You Use

This video explains how LEDs (Light Emitting Diodes) work and why they’ve become one of the most important components in ...
CNET

The Secret to Making Your LED Bulbs Actually Last as Long as the Box Says

The numbers you see on the box don't always work out in real life. LED bulbs do last longer, but those claims about five to 10 years are estimates based on internal testing -- and companies are always ...