Hui has a problem with compact fluorescent light bulbs (CFLs), specifically electronic ones. He wants them out of people's homes as much as an increasing number of governments around the world ...

Our tests found that new LEDs and CFLs are light-years ahead of earlier versions. Standard 60- and 40-watt bulbs are the last to be phased out, though remaining stock can be sold; 75-watt bulbs ...

Then the strip cools and closes the circuit again. Twinkling lights do exactly the opposite. The bimetallic strip shorts the bulb out rather than open the circuit. Twinkling sets also use a lot o ...

In this setup, if one bulb burns out in the strand, the current won't flow through the entire circuit, which means the entire string of Christmas lights will go out. Some of these could be ...