LEDs in flashlights, while more efficient than traditional bulbs, can still generate a fair amount of heat. And with some manufacturers vying to produce the brightest flashlight made, the heat ...

In 30 minutes, I dried the Streamlight off and clicked the power button—the light came on immediately. In the field test with my helper, its LED beam at the highest setting was bright enough to ...

The flashlights were sold as part of the kit and individually as an add add-on component. “Bright Builder” is on the front of the kit box and “Intellio Toys” is on the side panel.

But none of these may be as secure as [mircemk]’s Arduino-based door lock that employs a smartphone’s flashlight as a pass code. At first blush, this seems horribly insecure. Use a plain old ...

The brightest is Sirius, the “Dog Star,” which rises in November. Polaris is also not one star. It's a triple star system, with the point of light you see actually the combined brightness of ...

Several people from Virginia to Pennsylvania shared videos on social media speculating what they saw in the sky.

The North Star is a triple star system, situated between about 430 and 450 light-years from Earth, with Polaris being the brightest star of the three. The Polaris itself is a strange pulsating ...

With its bright, wide-angle beam and long run time, this headlight should meet the needs of most commuters. An adjustable cam mount keeps the light steady on a wide range of handlebars ...

Betelgeuse, one of the brightest stars in the sky, may have a secret sunlike companion that drives the star’s mysterious ... But if you plotted Betelgeuse's light intensity over years, you ...

September is the perfect month to look for Fomalhaut, the "autumn star," from mid-northern latitudes. It's the 18th brightest star ... just 25 light-years away from the solar system.