One of the most important gadgets you can own is a strong, reliable flashlight. Whether you're going out camping in the middle of absolute nowhere, spelunking in a pitch-black cave, or prowling the ...

We unboxed and tested three absurdly powerful flashlights—from an $800 “handheld sun” to a suitcase-sized monster—and then took them outside to see what 40,000+ lumens actually looks like. Fans spun ...

In this video I see how fast we can get a radiometer to spin by shining the world's brightest flashlight on it. Then I talk ...