Watts and lumens — they both describe lightbulbs, but do you know what they actually mean? Did you know that wattage is no longer a reliable way to tell how bright a bulb is? Do you know what makes ...

For most of us, all of our lives we have associated watts with the brightness of a light source. After all, when we change a light bulb at home, we choose a 100 watt bulb if we want more light than we ...

Alina Bradford has been writing how-tos, tech articles and more for almost two decades. She currently writes for CNET's Smart Home Section, MTVNews' tech section and for Live Science's reference ...